public class Solution {

public static void main(String[] args) {

    Scanner sc=new Scanner(System.in);
    String A=sc.next();
    String B=sc.next();

    sc.close();
    /* Enter your code here. Print output to STDOUT. */
    System.out.println(A.length()+B.length());
    if(A.charAt(0)<=B.charAt(0)){
        System.out.println("No");
    } else {
        System.out.println("Yes");
    }

    System.out.println(A.substring(0,1).toUpperCase() + A.substring(1) + " " + B.substring(0,1).toUpperCase() + B.substring(1));
}

}