#include <iostream>
#include <string>
using nmaespace std;
int main(){
    string s;
    getline(cin,s);
    string word="";
    for(int i=0;i<s.length();i++){
        if(s[i] !=' '){
            word = s[i] + word;
        }else{
            cout<<word;
        }
    }
    return 0;
}