#include <iostream>
using namespace std;
void exchange(int *num_1,int *num_2)
{
int num_3;
num_3 = *num_1;
*num_1 = *num_2;
*num_2 = num_3;
cout << *num_1 << '\t' << *num_2 << endl;
}
int main()
{
int num_1, num_2;
int *num_3, *num_4;
cin >> num_1;
cin >> num_2;
num_3 = &num_1;
num_4 = &num_2;
exchange(num_3, num_4);
return 0;
}