Java String Introduction

/*Trần Việt Anh - 8:52PM - 3/9/2019 */
import java.io.*;
import java.util.*;

public class Solution {

    public static boolean isLower(String s1, String s2) {
        int index1 = 0, index2 = 0;
        while ((index1 < s1.length()) && (index2 < s2.length())) {
            if (s1.charAt(index1) < s2.charAt(index2)) return true;
            else if (s1.charAt(index1) > s2.charAt(index2)) return false;
            index1++; index2++;
        }
        if (index1 < s1.length()) return false;
        if (index2 < s2.length()) return true;
        return false;
    }

    public static String capitalize(String s) {
        StringBuilder strBuilder = new StringBuilder(s);
        strBuilder.setCharAt(0, (char)(s.charAt(0) - 32));
        return strBuilder.toString();
    }

    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());
        if (isLower(B, A))
            System.out.println("Yes");
        else System.out.println("No");
        System.out.print(capitalize(A) + " " + capitalize(B));

    }
}