#include <iostream>
using namespace std;

// 编写函数实现两数交换(引用方式)
void swap (int &m,int &n){
    int temp = m;
    m = n;
    n = temp;
}


int main() {

    int m, n;
    cin >> m;
    cin >> n;

    // 交换m和n
    swap (m,n);
    

    cout << m << " " << n << endl;

    return 0;
}