#include <iostream>
#include <fstream>
#include <sstream>
#include <vector>

using namespace std;


int keisti(int &a, int &b){
    cout << "AB "<< a << " " << b << endl;
    a = 1;
    b = 2;
    cout << "AB "<< a << " " << b << endl;
    return a+b;
}

int main(){
    int x = 4;
    int y = 5;
    cout << "XY " << x << " " << y << endl;
    keisti(x, y);
    cout << "XY "<< x << " " << y << endl;

    return 0;
}