#include <iostream>
#include <stdio.h>
#include <string>
#include <vector>
#include <cmath>
#include <algorithm>
#define MP make_pair
using ll = long long;
using namespace std;

int main()
{
  char a,b;
  cin >> a >> b;
  cout << b << " " << a << endl;
  return 0;
}