#include <bits/stdc++.h>
using namespace std;
int main(){
    int n,g,d=0;
	cin>>n;
	while(n){
		g=n%10;
		n=n/10;
		d=d*10+g;
	} 
    cout<<d;
}

/**************************************************************
	Problem: 1121
	User: chenmingyu
	Language: C++
	Result: Accepted
	Time:7 ms
	Memory:2072 kb
****************************************************************/