I got the answer

import java.io.; import java.util.; import java.lang.*;

public class Solution {

public static void main(String[] args) {


    int x,j=0;
    Scanner sc=new Scanner(System.in);
    String A=sc.next();
    String B=sc.next();
    int len=A.length()+B.length();
    System.out.println(len);
    {
    if(A.length()>B.length())
        x=B.length();
    else 
        x=A.length();
    }
    for(int i=0;i<x;i++)
        {
         char a=A.charAt(j);
         char b=B.charAt(j);
        if(a>b)
            {
            System.out.println("Yes");
            break;
            }
        else if(a==b)
            {
              j++;
              continue;
            }
          else
              {
              System.out.println("No");
              break;
              }
    /* Enter your code here. Print output to STDOUT. */
         }
         {
         if(j==A.length())
             System.out.println("No");
         else if(j==B.length())
             System.out.println("Yes");
         }
       if(A.length()>0)
           {
            String f= A.substring(0,1);
            A=A.replaceFirst(f,f.toUpperCase());
           }
       if(B.length()>0)
           {
            String fi= B.substring(0,1);
            B=B.replaceFirst(fi,fi.toUpperCase());
           }
        System.out.print(A+" "+B);

}

}