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

/**************************************************************
	Problem: 1121
	User: chensijia
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/