String Compare Program:

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.*;


class TestClass {
    public static void main(String args[] ) throws Exception {
        String a,b;
        int t,count=0;
        Scanner in=new Scanner(System.in);
         t=in.nextInt();
         while(t!=0)
         {
             count=0;
             a=in.next();
            b=in.next();
            char[] c,c1;
            c=a.toCharArray();
            c1=b.toCharArray();
                       
            for(int i=0;i<c.length;i++)
            {
              for(int j=0;j<c1.length;j++)
              {
                if(c[i]==c1[j])
                  {
                      count++;
                      break;
                   }
                 }
            }
            if(count>0)
               System.out.println("YES");
            else
              System.out.println("NO");
         
         t--;
}
}
}