import java.io.; import java.util.;

public class Solution {

public static void main(String[] args) {

    Scanner sc=new Scanner(System.in);
    String A=sc.next();
    String B=sc.next();
    /* Enter your code here. Print output to STDOUT. */

    System.out.println(A.length()+B.length());

    // lexicographical comparision
    if(A.compareTo(B)>0)
    {
        System.out.println("yes");
    }
    else{
        System.out.println("No");
    }
    char ch1 = (char)(A.charAt(0)-32);
    A= ch1+A.substring(1);

    char ch2 = (char)(B.charAt(0)-32);
    B= ch2+B.substring(1);

    System.out.print(A+" "+B);

}

}