#include<iostream>
#include<algorithm>
#include<cstdio>
#include<cstdlib>
#include<vector>
#include<string>
#include<sstream>
#include<cmath>
#include<numeric>
#include<map>
#include<random>
#include<stack>
#include<queue>
#include<cassert>
using namespace std;
int inf = 1000000000;


int main(void) {
  char A, B;
  cin >> A >> B;
  cout << B << " " << A << endl;

  return 0;
}





// EOF