#include<iostream>
#include<math.h>
#include<vector>
#include<algorithm>
#include<queue>
#include<set>
#include<map>
#define REP(i, n) for(long long i = 0; i < n; ++i)
#define ALL(a) a.begin(), a.end()
using namespace std;
typedef long long ll;
typedef pair<ll, ll> P;

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