diff --git a/lesson_11/arrays_java/arrays_app/src/main/java/com/codedifferently/lesson11/Lesson11.java b/lesson_11/arrays_java/arrays_app/src/main/java/com/codedifferently/lesson11/Lesson11.java
index 248938a96..206cdc60c 100644
--- a/lesson_11/arrays_java/arrays_app/src/main/java/com/codedifferently/lesson11/Lesson11.java
+++ b/lesson_11/arrays_java/arrays_app/src/main/java/com/codedifferently/lesson11/Lesson11.java
@@ -1,5 +1,6 @@
 package com.codedifferently.lesson11;
 
+import java.util.ArrayList;
 import java.util.List;
 
 public class Lesson11 {
@@ -10,13 +11,42 @@ public class Lesson11 {
    */
   public int[] getConcatenation(int[] nums) {
     return null;
+  }  
+  class Solution {
+    public int[] getConcatenation(int[] nums) {
+    int answer[] = new int[2 * nums.length];
+     for(int i = 0; i < nums.length; i ++) {
+    answer[i]= nums[i];
+    }
+    int index = nums.length;
+    for(int i = 0; i < nums.length; i ++) { 
+      answer[index] = nums[i];
+      index++;
+      }
+      return answer;
+    }
   }
 
+
+
   /**
    * Provide the solution to LeetCode 2942 here:
    * https://leetcode.com/problems/find-words-containing-character/
    */
   public List<Integer> findWordsContaining(String[] words, char x) {
+
     return null;
   }
-}
+} 
+
+ class Solution {
+ public List<Integer> findWordsContaining(String[] words, char x) {
+  List<Integer> resultWords = new ArrayList<>();
+  for (int i = 0; i < words.length; i++) {
+    if (words[i].indexOf(x) != -1) { 
+        resultWords.add(i);
+      }
+    }
+   return resultWords;
+ }
+}
\ No newline at end of file