Remove duplicates from arraylist of objects android

Remove duplicates from arraylist of objects android. Apr 24, 2024 · Kotlin. list. The objects have three fields: title, subtitle, and id. Aug 11, 2018 · The distinct () function can be used to removed duplicates using a natural comparison, for that first override equals () and hashCode () method in Person class. y > gHeigh); edited Mar 8, 2016 at 10:10. Regarding your comment: Sort arraylist by number of times in arraylist and then remove duplicates. In this simple example, we have a list of odd and even numbers. add all elements from set to arraylist. Set<String> ol Feb 15, 2014 · 34. ArrayList<Destination> destinationArrayList = new ArrayList<Destination>(); Set<Destination> hashset = new HashSet<>(); hashset. The idea is to convert the given list to a set collection. Jun 27, 2012 · * The relationship can be one of three values: * <pre> * -1 - This object should be discarded and other kept * 0 - There is no relationship between this and other * 1 - This object should be kept and other discarded * </pre> * * @param other The other instance to evaluate * * @return 0 if there is no relationship. Feb 5, 2017 · When you remove the "dog" at index 1, the list now becomes "dog", "dog", "cat". Run 2 pointers and remove the duplicates manually by running 2 for loops one inside the other like we used to do in C language for arrays. This is one of the questions asked by an interviewer in one of the interviews. D) If not present, add it to the newList. The most straightforward solution to achieve this would be Dec 1, 2023 · To remove duplicate elements using an iterator we can create another arraylist and then traverse through the arraylist and store the first occurrence of each element. remove (Integer. If a subtitle occurs multiple times, I only need the first item with thats subtitle (ignore the remaining object with that subtitle). Overview. addAll() to pass a collection and it will maintain the order for you as well as ensure there are no duplicates present. LinkedHashSet<>(); answered May 11, 2019 at 5:48. It removes all the duplicates automatically. natonomo. If you have an array of LocationData objects called allLocations it would be. Distinct(). I tried several methods like to remove duplicates as follows: Method I: Using HashSet. Comparator; import java. Using java-8 and lamdba expressions, the method removeIf has been introduced for collections. Apr 25, 2014 · I have a object e. Nov 17, 2020 · 2. Using the toMutableSet() function. android; list; kotlin; or ask how to remove the repeated item in arraylist of class. B) Iterate the duplicate List. What I want is to remove items from ArrayList comparing with mId, that matched the values in the String Array. Mar 19, 2024 · 1. arrayOfArraySorted = [ [A,1,B,2], [C,1,D,2]] Is this possible without also sorting the Sep 24, 2015 · 1. addAll(modelData. To remove the duplicates there is a simple and easy way, just convert the ArrayList to HashSet and get the unique elements. Let's see an example to remove duplicates from ArrayList: public class RemoveDuplicateArrayList {. Aug 3, 2015 · It,s not a duplicate of that question. Loop with Map. Jul 24, 2018 · and from that array I would like to remove duplicate items so it should look like this array = [{6, 2018}, {7, 2018} {8, 2018}] And that data from array I would be showing in listview and onListViewItem click it will show all data for selected month. With an ArrayList<Integer>, removing an integer value like 2, is taken as index, as remove(int) is an exact match for this. Hashtable ht = new Hashtable(); foreach (string item in originalArray){. Using the distinct() function. Here, we have used the LinkedHashSet to create a set. 9. The best way to remove any item or object from arrayList. 1 If the element is not in the new list, add it. I can remove elements from ArrayList of predefined classes but my question is to make my list unique using custom class which contain more than one variables. empty the arraylist using clear () method. Set<Customer> s = new HashSet<Customer>(listCustomer); Otherise just use a Set implemenation HashSet, TreeSet directly and skip the List construction phase. util. collections4. ArrayList distincArray = new ArrayList(ht. 4K Views. 1. valueOf (1)); and look at the result! You will get answer why your solution is wrong! Because it removes duplicates and maintains the insertion order. After Apr 1, 2015 · Create a new empty list. I did the same thing in java using Collections. remove(ss[i]); } Jan 10, 2023 · Methods: There are 3 ways to remove an element from ArrayList as listed which later on will be revealed as follows: Using remove () method by indexes (default) Using remove () method by values. The ToList creates a new list with the distinct strings. 3. Dec 10, 2017 · I need to remove objects from above list such as, it treats combination of "a,b" and "b,a" as duplicates and remove any of those duplicate. LinkedHashSet automatically removes all duplicate objects. Amit Shekhar Jun 20, 2014 · Students students7 = new Students("yogi","jos","someotherUName2"); Now all these objects get added to combinedList. Step 2 - Declare namely. How to Count Unique Values in an ArrayList? 1. If you are allowed to use Java 8, this is much easier: static <E> List<E> removeDuplicates(List<E> list) {. arrayone then contains: b and c. distinctBy { it. So, we understood how to remove duplicates from an array in Kotlin. answered Jan 2, 2014 at 15:54. Dec 16, 2017 · 1. The Object class equals() method implementation is: Apr 20, 2024 · 1. distincBy { it. addAll(setItems); . return list. toSet() . Unique Elements can be obtained from the Set. List ; One liners with filter() (Preserves order). Sep 16, 2022 · Here, as we have used it to remove duplicate mentors from the array, similarly, we can use it to remove any duplicate elements like strings, numbers, etc from an array. values(). Java List interface provides stream () method which returns a sequential Stream with list of User as its source here. Note: It is not recommended to use ArrayList. Prepare yourself for Android Interview: Android Interview Questions. 2. java. Print the array list. Emptying the ArrayList, you can use clear () method to remove all elements of ArrayList and start fresh. The objects have three fields: fName, lName, and id. I tried it by making to arraylist of objects. Improved code to return the duplicate elements. } I am given a List<name>, sorted by localdatetime in desc order. g. I want to compare age variable the objects in the ArrayList. @Override. But no luck for (int i = 0; i < 10; i++) { hList. Apr 16, 2015 · If you can make use of equals, then filter the list by using distinct within a stream (see answers above). Jul 11, 2019 · Set<MyClass> set = new HashSet<>(list); The resulting set won't have any duplicates and you can now replace your list with the new values list = new ArrayList<>(set); if you need to. First one contains all objects including duplicate and the another contain only the unique one. Since Set doesn't contain duplicate elements, it will have only unique elements. remove(index); 13. If you want to maintain the order of the items in the original list, instantiate LinkedHashSet instead of HashSet. Mar 24, 2017 · array remove duplicates arraylist remove duplicates collection java java collection framework java collections tutorial java list remove duplicates java remove duplicates from arraylist Recently i write one post related to remove duplicate object from Array, But in that example i used String Example and String is immutable object and too much Sep 8, 2020 · I want to remove all duplicate objects of one type from a list. Add several values into messages list. Step 4 – Create an ArrayList of integer values and initialize elements in it. clear() operation. joinToString() The output then will be. public class name{ int age; localdatetime borndate; //getter/setters etc. Stream’s distinct() method returns a stream consisting of the distinct elements (according to Object. At present the removal for each element one by one creates an overhead, a better alternative for this use-case is a TreeSet (log (n) time for operations like add, remove and contains) You could use an TreeSet. I'm having a hard time remove duplicate items from my ArrayList of custom objects. Approach: Create an array list in Java and add some elements to it. To remove duplicate elements from the arraylist, we have. Once you have the Set you can again pass it back to ArrayList. name } Dec 27, 2017 · I am working with two array of objects to remove duplicates objects. Feb 14, 2019 · I have a ArrayList of String type which contains values as range = {300-400, 100-200, 500-600, 300-400, 500-600} I need to sort it out and remove the duplicates present in it. Just in case you plan to override equals (), make sure you override hashcode () method as well. Using remove () method over iterators. First you can remove the object by index (so if you know, that the object is the second list element): a. 24. Let’s say we have got an array of employees with duplicate values for the id attribute: val emp1 = Employee( "Jimmy", "1" ) val emp2 Feb 26, 2021 · 1. Jun 10, 2015 · I have requirement to remove the duplicate object from my arraylist of object. There are two versions of remove() method: ArrayList#remove(Object) that takes an Object to remove, and. Remove Duplicates From a List Using Plain Java. Step 3 - Define the values. Here is my BaseAdapter code Oct 19, 2023 · @Buckstabue I see, I believe we're talking about two different issues: 1) to*Set is more efficient (space & time) than distinct[By] because it returns the Set directly instead of using a Set internally and converting it to a List as its return value and 2) distinctBy is can be more efficient than distinct simply because you can avoid full object equality comparison. add all elements from arraylist to set. name } . You have several options. 2 Else, ignore it. Step 5 - Display the ArrayList on the console. So to remove duplicates we are using two approaches one is converting to HashSet and the second is to use a distinct () method of Jul 5, 2016 · If you want to have a unique set of the hashmaps then you can simply do: Set<HashMap<String, String>> set = new LinkedHashSet<String>(); set. time } Note distinctLocations will be a List; if you want it to be an array, use toTypedArray() answered Aug 24, 2018 at 0:03. Feb 24, 2014 · So effectively, it's a one-liner: list = new ArrayList<String>(new LinkedHashSet<String>(list)) Any approach that involves List#contains or List#remove will probably decrease the asymptotic running time from O (n) (as in the above example) to O (n^2). distinct(). List<Person> personsWithoutDuplicates = persons. I need a method that when it finds a duplicate name in the arraylist,it removes the object with the smaller timpestamp. Stream distinct() method. public static <T> List getDuplicate(Collection<T> list) {. Jul 26, 2012 · I have 2 ArrayList of custom objects. It’s because we didn’t implement the equals() method in the Data class. It seem pretty easy in theory but i am really stuck. source = src; Oct 4, 2011 · No need to loop your list to remove objects from list. What am I doing wrong here Suppose that you have a class named Person that has two property: id , firstName . arrayListOf then uses that removed item to create a new (the second) list. return the set of duplicates. Consider I've a class Foo() Sep 29, 2020 · remove duplicates from arraylist of objects java,remove duplicates from arraylist without using set,remove duplicate objects from arraylist java 8. Remove All Even Numbers from a List of Numbers. addAll(destinationArrayList); Nov 19, 2016 · As @Eran notes, you can't work with arrays directly, since they don't override Object. push(item); } } return result Sep 17, 2023 · By Editorial @stacktips, On Sep 17, 2023 Java 2. java. So while removing the duplicates, we have to keep the employee with maximum age and remove all other duplicates. this. The arraylist contains duplicate elements. . remove (1); and messages. We can easily remove the duplicate elements from a List with the standard Java Collections Framework through a Set: List<Integer> listWithDuplicates = Lists. Nov 7, 2017 · Create a list of messages: List<Message> messages = new ArrayList<> ();. Override equals and hashCode methods and Converting the list to a set by passing the list to the set class constructor and do remove and add all. collect () is one of Stream API the Java 8 terminal methods. remove(1); // indexes are zero-based Or, you can remove the first occurence of your string: Jun 8, 2018 · I am trying to remove duplicates from an ArrayList in Kotlin. If there are multiple such objects, then the first occurrence of the object is removed. commons. size() > 1) . Remove duplicate elements from a list in Kotlin. So the superclass Object equals() method was used to identify equal elements. May 11, 2024 · We can easily remove the duplicate elements from a List with the standard Java Collections Framework through a Set: public void givenListContainsDuplicates_whenRemovingDuplicatesWithPlainJava_thenCorrect() { List<Integer> listWithDuplicates = Lists. flatMap(Collection::stream) May 13, 2013 · Merging two arrayLists into a new arrayList, with no duplicates and in order, in Java -7 Merge Two List which have different size, In one with stream api on certain conditions That means we have 3 duplicated objects having id 1 and in new array we need to sum of all percentage value which have same id and consider it as a one object. It worked perfectly fine there but now I'm unable to achieve this in Koltin I'm getting an ERROR. distinct() . Sep 27, 2018 · 46. We will use Comparator to remove duplicate elements. equals(). Dec 31, 2023 · # How to remove duplicate values from ArrayList using SetUniqueList? apache common-collection API provides org. . val distinctLocations = allLocations. So our new arraylist build like this way. You may want to use drop instead, if you didn't want to touch the first list and if you only wanted to add the remaining items to the Apr 15, 2019 · This has values that match with mId in the ArrayList. Sep 25, 2023 · Let’s create a JavaScript function called removeDuplicatesBasedOnKey to tackle this problem efficiently. To remove duplicates from an ArrayList you could do. That's it for now. joinToString { it. If you can not or don't want to override the equals method, you can filter the stream in the following way for any property, e. Updated 2 weeks ago. May 20, 2016 · Enumerable. Removing Duplicates. Feb 19, 2019 · You can use filter it will return a new array set as your checked condition. If you look at the Javadoc for List at the contains method you will see that it uses the equals() method to evaluate if two objects are the same. The easiest way to remove duplicate is by passing the List to an Set. EDIT For the requirement mentioned in the comment: If you want to remove duplicate elements Aug 25, 2017 · If you look at the implementation of the distinctBy, it just adds the value you pass in the lambda to a Set. ArrayList<ListTableClass> ltc2 = new Jun 18, 2014 · Afterwards, you can use a HashSet to store already seen instances while iterating over the ArrayList. stream(). In this short tutorial, we’ll look at some different ways to count the duplicated elements in an ArrayList. Apr 5, 2024 · remove(Object): This method is used to simply remove an object from the ArrayList. equals(Object)) of this stream; Below example removes duplicate String elements and maintains original insertion order Jun 10, 2021 · 0. Traditional solution: Set<String> result = new LinkedHashSet<>(); for (List<String> innerList : filmingLocations) result. removeAt(0) removes the first element from the first list and returns it. Let’s start by taking a basic scenario where we’ve got an array of strings with duplicate values, and we’re required to remove duplicate values from it. You can use HashSet for that. String source; String destination; DataClass(String src, String dest) {. arrayList. filter(duplicates -> duplicates. ArrayList<ListTableClass> ltc = new ArrayList<ListTableClass>();//has duplicate. Copying all the elements of LinkedHashSet (non-duplicate elements) to the ArrayList. ToList(). Find duplicates in ArrayList. I have tried using HashSet its removing the duplicates but sorting order is not maintained. E) If present, do not add it to the newList. map { it. It contains duplicate employee objects with only difference in their age, but name and id will be same. println(listWithoutDuplicates); Output: size of Arraylist with duplicates: 4. remove(int index): Since an ArrayList is indexed, this method takes an integer value which simply removes the element present at that specific index in the ArrayList. In this short tutorial, we’ll learn how to remove duplicate values from an array in Kotlin. It won't box 2 to Integer, and widen it. Looks like this array of array maybe was sorted on the A or the B. Since you want to remove duplicates from your list you have to re-assign them to the list variable: oList = oList. e. I tried solving this. add ("Mango Dec 15, 2011 · Removing on the basis of specified index position of arrayList. Apr 14, 2021 · So i have this Arraylist of objects,those objects have name and timestamp as attributes. Jun 3, 2015 · 1. So it will only take one line : pixels. F) Finally, newList is free from duplicates. addAll(innerList); As result is a LinkedHashSet, it preserves insertion order, so the order of the elements will be as in the inner lists. arraylist. Step 6 - Create another linkedhashset of integers. Hence, arrays a and b are only equal if they are the same instance (a == b). If you'r using a model class then you need to create a arraylist of your model class. The toMutableSet Extension Function. List combinedList = new ArrayList<SchoolStudents>(); I want to remove duplicate objects from this combinedList based on the following criteria; if fName is same OR if uName is same. Remove objects from ArrayList. I added the words arraylist to a hashset to remove the duplicates. ArrayList implements the List Interface. ArrayList<UnchainedRestaurant> noDuplicates = new ArrayList<>(); Set<UnchainedRestaurant> setItems = new LinkedHashSet<UnchainedRestaurant>(arraylist); noDuplicates. new HashSet <>(listWithDuplicates)); May 11, 2019 · Override hashCode () and equals () method in your POJO and use LinkedHashSet instead of ArrayList. My solution: step 1) Override equals method in DataClass class. If you already have a List<Customer> and want to de duplicate it. And it will give the correct result. option_values[0]. I have an ArrayList of custom objects. To remove dupliates from ArrayList, we can convert it into Set. arraytwo then contains a. Since HashSet stores unique elements only. 1. toList()); } In your case, there's no need to iterate through the list, because you know which object to delete. For such scenarios, Kotlin provides the distinctBy extension function, which we can use to specify criteria for removing duplicate values. I then copied each column into their own arraylist. yourList = new ArrayList<String>(new LinkedHashSet<String>(yourList)); Using LinkedHashSet instead of a HashSet ensures that the order of the original lists are preserved. Oct 20, 2010 · If you want to allow a user to add a bunch of new MyObjects to the list, you can do it with a for loop: Let's say I'm creating an ArrayList of Rectangle objects, and each Rectangle has two parameters- length and width. newArrayList( 5, 0, 3, 1, 2, 3, 0, 0 ); List<Integer> listWithoutDuplicates = new ArrayList <>(. ht[item] = null; } //now grab the keys from that hashtable into another arraylist. If you have some identifier in the objects which signifies uniqueness (e. The problem is that your "j" index is now incremented to 2 so the next test will access the "cat" item, not the "dog" item. I also realize that I could just stuff all the elements into a Set and it would remove the duplicates, but I want to keep the 'removed' and 'new' Person objects separate. What i ve tried is this : Mar 1, 2021 · 1. First, find the index of the item which you want to remove. ArrayList#remove(int) that takes an index to remove. seen. If the elements you wish to remove are all grouped together, you can do a subList(start, end). Mar 19, 2024 · As a result, we can have multiple criteria to retrieve distinct values. May 17, 2010 · The correct answer for Java is use a Set. Apr 15, 2015 · I have a List and it has duplicate value, I want to leave out the duplicate values from that and filter only the single values as, Current output is {a, a, a, b, b, c, c, d, d, d, d} and I want to May 27, 2019 · A) Create a new List. To make your life easier, you could switch to a HashSet altogether and be done with duplicates per se. If what you are looking for is speed, and don't mind using up some memory then I would recommend that you use a HashSet, if you are interested in doing some custom comparison, then you can make an IEqualityComparer<T>, something like this: I realize that I could probably deep clone the updated ArrayList and just remove the objects from that one, but I'm wondering if there is a way without having to clone it. size()); //should print 3 becaues of duplicates Android removed. Step 7 - Use the ‘addAll’ method to include elements from previous ArrayList into it as elements. LinkedHashSet<YourPojo> uniqueObjects =new java. When you find an instance which is not in the HashSet, add it to the HashSet, else remove it from the ArrayList. ArrayList<Names> al = new ArrayList<Names>(); Set<Names> hs = new HashSet Mar 30, 2022 · Step 1 - START. If the elements you wish to remove are scattered, it may be better to create a new ArrayList, add only the elements you wish to include, and then copy back into the original list. Aug 19, 2021 · List<String> listWithoutDuplicates = new ArrayList<String> (listToSet); System. id), then we can use filter() with findIndex() to work through the list and verify that the index of each object with that id value matches only itself. This function will take an array of objects and a key as parameters, ensuring that duplicates are removed while keeping the code simple and the time complexity low. The final output should be range = {100-200,300-400,500-600}. import java. To understand the usage of each function let us consider the following example: You have a data class called Node: data class Node(val id: Int, val Feb 12, 2015 · I then have a for loop to get the frequency a particular word occurs in all of the files and add it to another column. Or if this array list is being modified somewhere, then you can make a new Arraylist and loop through all the items in idFAV and add only if its not present in the new list. This example shows how to remove duplicate from ArrayList. HashSet requires that you declare equals and hashCode methods, while TreeSet requires your class to implement Comparable with a compareTo method or supply a Comparator. write this mehod in its class: return id + firstName; The getDuplicates() method is now should be such as: return getDuplicatesMap(personList). If this is all the places you are using ArrayList, then simplest fix is to check if the idFAV contains the FileName before adding it and you will never have duplicates. You can also use an equivalent Java 8 solution: Oct 22, 2022 · There are a few ways to remove duplicates from an array in kotlin: Using the toSet() function. List<String> l = new ArrayList<String> (); l. apache. Then call this arrayList method, this method removes the item on index basis. You should convert the list to a Set before you join, not after. You can also use distincBy to omit a map operator. asList () method is a fixed-size list, which means we cannot add or remove elements from it. Removes all of the elements of this collection that satisfy the given predicate. remove () when iterating over elements. This article explores different ways to remove duplicate elements from a list in Kotlin without destroying the original ordering of the list elements. If there are other occurances of people with same age, then remove everyone else and keep the latest value. Using Set. Then we use the removeIf() method to remove all even numbers from the list. First of all I am getting a sortedNews from somewhere else and then I am adding it to the list called newsItems and then I am trying to remove the duplicates but the duplicates are still there. I tried like this. The search will start at the specified position, or at the beginning if no start position is specified, and end the search at the end of the array. toList()); Note: for custom comparison Comparator interface can be used. And if the Set did not already contain the specified element, it adds the respective item of the original List to the new List and that new List is being returned as the result of distinctBy. println("size of ArrayList without duplicates: " + listToSet. System. a) For duplicate entries in the list indexOf and lastIndexOf return different results: Mar 30, 2020 · I have an ArrayList of ArrayList what I want to achieve is, to sort them in descending order (based on the Highest to lowest List size ) to get the largest first and onwards. 0. Aug 7, 2023 · For removing the elements from the arraylist, we can create the conditions in multiple ways using the Predicate instances. Can find duplicates in a Collection. //remove any duplicates. lang. Aug 23, 2018 · You can use the extension function distinctBy. Let us see a few usecases. Oct 19, 2018 · Starting point: public class Employee { private String id; private String name; private String age; } I have a list of Employee: List&lt;Employee&gt; employee; Employee examples from Feb 28, 2021 · There are many ways to find and keep the duplicates in the list providing that the object in the list has properly implemented methods equals and hashCode. public static void main (String [] args) {. Jun 29, 2017 · We have a ArrayList. removeIf(px -> px. So every time you remove an item you are skipping the next item in the list which is why you get inconsistent results. Using Collection::removeIf + a predicate to detect a duplicate entry. edited Jul 25, 2012 at 14:25. //set a key in the hashtable for our arraylist value - leaving the hashtable value empty. For each element in the original list. equals() method used to avoid duplicates on HashSet. but I want to remove only consecutive duplicates of the frequency arraylist. Add a duplicate element. Removing objects from ArrayLists. Removing from an arraylist android. collect(Collectors. displaylist) ArrayList<String> uniqueList = new ArrayList<String>(set); But notice that the set uniqueness will be from the hashmap instances and not their content. Using the toHashSet() function. I want to remove duplicate entries. out. Create another array list. The solution is to either: The object returned by the Arrays. ): Set<String> nameSet = new HashSet<>(); May 11, 2024 · 2. Please find below the complete code : import java. Keys); Aug 3, 2022 · The distinct() method didn’t remove the duplicate elements. stream() . The indexOf() method searches the array for the specified item, and returns its position. – Feb 9, 2011 · 0. LinkedHashSet ; import java. Mar 27, 2012 · 11. TreeSet; public class RemoveDuplicate {. SetUniqueList class which contains SetUniqueList used to remove duplicates from an arraylist and returns new list without duplicates. However, there are two Set implementations in Java: HashSet and TreeSet. Feb 14, 2014 · Default implementation of equals() method provided by java. for the property Name (the same for the property Id etc. Distinct is a LINQ extension method which returns a sequence without duplicates(if the type overrides GetHashCode + Equals like string). I have array1 of Class1. Object compares memory location and only return true if two reference variable are pointing to same memory location. Sep 27, 2015 · Now all my requirement is to remove the repeated names contains in the ArrayList. Thanks. If the id occurs multiple times, I want to remove from both the lists. As set doesn’t support duplicates it will omit the duplicate values. C) Take each value from duplicate list then checks in newList using contains () method whether this element is present in the newList. Jun 4, 2014 · In the end I want this (duplicates was removed): arrayOfArrayNoDuplicates = [ [C,1,D,2], [A,1,B,2]] Then as a final step I want this array of array to be sorted on the first item in the array. Adding values into the HashSet and assigning back those values into new ArrayList<Names> named al. And try to remove any item from that list: messages. I want to remove duplicate entries from both the ArrayList. final List<T> duplicatedObjects = new ArrayList<T>(); Set<T> set = new HashSet<T>() {. String name; String number; I added objects like below: Feb 27, 2014 · 1. Set; import java. newArrayList( 5, 0, 3, 1, 2, 3, 0, 0 ); Mar 9, 2018 · If I want to honest you I don't know work by any collection in android or and java, but my question and my purpose, I want remove duplicate item in ArrayList of My Model or my class this is my Model in below: Dec 24, 2014 · The most optimal solution would be if you could use a Set. How can I do that? I am fine with merging both the lists and removing the 2 duplicate entries as well. set(keyValue, true); result. put () Our expected result would be a Map object, which contains all elements from the input list as keys and the count of each element as value. qm sg um lc io am qw mx gc zw