#include<bits/stdc++.h>
using namespace std;
#define REPF(i,a,n) for(int i=a;i<(int)(n);i++)
#define REP(i,n) REPF(i,0,n)
#define ALL(c) begin(a),end(a);
#define RALL(c) rbegin(a),rend(a);
#define SZ(c) (int)(c.size())
int main() {
    char a,b;
    cin>>a>>b;
    swap(a,b);
    cout<<a<<" "<<b<<endl;
    return 0;
}