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

public class Solution {
    public static String capitalize(String str){
        StringBuilder capitalize = new StringBuilder();
        char firstChar = str.charAt(0);
				capitalize.append(Character.toTitleCase(firstChar)).append(str.substring(1));
        return capitalize.toString();
    }

    public static void main(String[] args) {
        
        Scanner sc = new Scanner(System.in);
        String A=sc.next();
        String B=sc.next();
        sc.close();
        System.out.println(A.length() + B.length());
        if(A.charAt(0)>B.charAt(0)) System.out.println("Yes");
        else System.out.println("No");
        System.out.println(capitalize(A) + " " + capitalize(B));
    }
}