#include <bits/stdc++.h>

using namespace std;

int main() {
    int a, b;
    cin >> a >> b;

    //更换1
    swap(a, b);

    cout << a << " " << b;
    cout << endl;

    //更换2
    int c;
    c = a;
    a = b;
    b = c;
    cout << a << " " << b;
    return 0;
}