diff --git a/OOP/Java/Lab/Week9/palin_alpha_rev_concat.java b/OOP/Java/Lab/Week9/palin_alpha_rev_concat.java
index afb0558..171edca 100644
--- a/OOP/Java/Lab/Week9/palin_alpha_rev_concat.java
+++ b/OOP/Java/Lab/Week9/palin_alpha_rev_concat.java
@@ -1,82 +1,82 @@
-import java.util.Scanner;
-class palin_alpha_rev_concat{
-    static boolean palindrome(String str)
-    {
-        String rev=reverse(str);
-        return str.contentEquals(rev);
-    }
-    static String[] alphabetic(String str)
-    {
-        String arr[]=str.split(" ");
-        for(int i=0;i<arr.length-1;i++)
-        {
-            for(int j=0;j<arr.length-i-1;j++)
-            {
-                int a=arr[j].compareTo(arr[j+1]);
-                if(a>0)
-                {
-                    String temp=arr[j];
-                    arr[j]=arr[j+1];
-                    arr[j+1]=temp;
-                }
-            }
-        }
-        return arr;
-
-    }
-    static String reverse(String str)
-    {
-        StringBuffer rev=new StringBuffer(str);
-        rev.reverse();
-        String revstr=rev.toString();
-        return revstr;
-    }
-    static String concating(String str)
-    {
-        String rev=reverse(str);
-        return str+rev; 
-    }
-    
-    public static void main(String[] args) {
-        Scanner in=new Scanner(System.in);
-        System.out.println("Enter the String");
-        String str=in.nextLine();
-        char contin='y';
-        while(contin=='y'){
-            System.out.println("What do you want to do?1 for checking palindrome,2 for alphabetic,3 for reversing,4 for concatinatig with reverse");
-            int choice=in.nextInt();
-            switch(choice)
-            {
-                case 1:
-                {
-                    System.out.println("String is a palindrome:"+palindrome(str));
-                    break;
-                }
-                case 2:
-                {
-                    String arr[]=alphabetic(str);
-                    System.out.println("String in alphabetic order:");
-                    for(int i=0;i<arr.length;i++)
-                    {
-                        System.out.print(arr[i]+" ");
-                    }
-                    System.out.println();
-                    break;
-                }
-                case 3:
-                {
-                    System.out.println("Reversed string="+reverse(str));
-                    break;
-                }
-                case 4:
-                {
-                    System.out.println("Concatenated String="+concating(str));
-                    break;
-                }
-            }
-            System.out.println("Continue?(y/n)");
-            contin=in.next().charAt(0);
-        }
-
-    }
+import java.util.Scanner;
+class palin_alpha_rev_concat{
+    static boolean palindrome(String str)
+    {
+        String rev=reverse(str);
+        return str.contentEquals(rev);
+    }
+    static String[] alphabetic(String str)
+    {
+        String arr[]=str.split(" ");
+        for(int i=0;i<arr.length-1;i++)
+        {
+            for(int j=0;j<arr.length-i-1;j++)
+            {
+                int a=arr[j].compareTo(arr[j+1]);
+                if(a>0)
+                {
+                    String temp=arr[j];
+                    arr[j]=arr[j+1];
+                    arr[j+1]=temp;
+                }
+            }
+        }
+        return arr;
+
+    }
+    static String reverse(String str)
+    {
+        StringBuffer rev=new StringBuffer(str);
+        rev.reverse();
+        String revstr=rev.toString();
+        return revstr;
+    }
+    static String concating(String str)
+    {
+        String rev=reverse(str);
+        return str+rev; 
+    }
+    
+    public static void main(String[] args) {
+        Scanner in=new Scanner(System.in);
+        System.out.println("Enter the String");
+        String str=in.nextLine();
+        char contin='y';
+        while(contin=='y'){
+            System.out.println("What do you want to do? 1. Check for Palindrome; 2. Write in an alphabetic order; 3. Reverse the String; 4. Concatenate with reversed");
+            int choice=in.nextInt();
+            switch(choice)
+            {
+                case 1:
+                {
+                    System.out.println("String is a palindrome:"+palindrome(str));
+                    break;
+                }
+                case 2:
+                {
+                    String arr[]=alphabetic(str);
+                    System.out.println("String in alphabetic order:");
+                    for(int i=0;i<arr.length;i++)
+                    {
+                        System.out.print(arr[i]+" ");
+                    }
+                    System.out.println();
+                    break;
+                }
+                case 3:
+                {
+                    System.out.println("Reversed string="+reverse(str));
+                    break;
+                }
+                case 4:
+                {
+                    System.out.println("Concatenated String="+concating(str));
+                    break;
+                }
+            }
+            System.out.println("Continue?(y/n)");
+            contin=in.next().charAt(0);
+        }
+
+    }
 }
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