#include <iostream>
#include <string>
using namespace std;

int main() {
	// Complete the program
    string a, b; 
    cin >> a; 
    cin >> b; 
    
    cout << a.size() << " " << b.size() << endl; 
    cout << a + b << endl;
    
    char temp = b[0]; 
    b[0] = a[0];
    a[0] = temp; 
    
    cout << a << " " << b << endl;
    
    
    return 0;
}

#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;


int main() {
    string a, b, c{};
    cin >> a >> b;
    cout << a.size() << " " << b.size() << endl;
    cout << a + b << endl;


    for (double i = a.size(); i <= a.size(); ++i)
    {
        char temp = a[0];
        a[0] = b[0];
        b[0] = temp;

        cout << a << string(1, ' ') << b;
    }


    return 0;
}

#include <iostream>
#include <string>
using namespace std;

int main() {
	string kata1,kata2;
    string jumlah;
    getline(cin,kata1);
    getline(cin,kata2);
    cout << kata1 << endl;
    cout << kata2 << endl;

    int panjang1 = kata1.size();
    int panjang2 = kata2.size();
    cout << panjang1 << " " << panjang2 << endl;
    // cout << panjang2 << endl;
    // kata1.append(kata2);
    jumlah = kata1 + kata2;
    cout << jumlah << endl;  why test case failed link https://www.hackerrank.com/challenges/c-tutorial-strings

    kata1[0] = kata2[0];
    kata2[0] = kata1[0];
    cout << kata1 << " " << kata2 << endl;

int main() {
	// Complete the program
    string letras_a;
    string letras_b;
    cin >> letras_a;
    cin >> letras_b;
    
    cout << letras_a.size() <<" ";
    cout << letras_b.size() << endl;
    
    cout << letras_a + letras_b << endl;
    cout << letras_b[0];
    for(int i = 1;i<letras_a.size();i++){
        cout << letras_a[i];
    }
    cout << " " << letras_a[0];
    for(int i = 1;i<letras_b.size();i++){
        cout << letras_b[i];
    }
    
    return 0;
}