#include <bits/stdc++.h> using namespace std; typedef long long ll; #define REP(i,n) for(int i=0;i<n;++i) #define SORT(name) sort(name.begin(), name.end()) #define ZERO(p) memset(p, 0, sizeof(p)) #define MINUS(p) memset(p, -1, sizeof(p)) #define MOD 1000000007 #define INF 1000000000 char a, b; int main() { cin >> a >> b; printf("%c %c\n", b, a); return 0; }