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();

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

    if (A.compareTo(B) > 0) {
        System.out.println("Yes");
    } else {
        System.out.println("No");
    }

    String AB = A + " " + B;
    String[] split = AB.split(" ");
    StringBuilder sb = new StringBuilder();

    for (String s : split) {
        char upper = Character.toUpperCase(s.charAt(0));
        sb.append(upper).append(s.substring(1)).append(" ");
    }
    System.out.println(sb);
}

}