Finding Missing Characters

String S which is a palindrome is passed as the input.

But just one alphabet A is missing in S. The program must print the missing alphabet A.

 Note: The FIRST alphabet of S will always be present.

Input Format: The first line contains S.

Output Format: The first line contains the missing alphabet A.

Boundary Conditions:

The length of the input string S is between 3 to 100. The FIRST alphabet of S will always be present.

Example Input/Output 1:

Input:

malayaam

Output:

l

Example Input/Output 2:

Input:

abcddcb

Output:

a

Code:

import java.util.*;

public class Hello {

    public static void main(String[] args) {

 Scanner sc=new Scanner(System.in);

 String str=sc.next();

 char[] ch=str.toCharArray();

 int i,j;

 for(i=0,j=ch.length-1;i<ch.length/2;i++,j--)

 {

     if(ch[i]!=ch[j])

     {

         if(ch[i]==ch[j-1]&&(i!=j-1))

            {

            System.out.print(ch[j]);

         break;

            }

            else

            {

              System.out.print(ch[i]);

              break;

            }

     }

 }

   

 }

}