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

/**************************************************************
	Problem: 1121
	User: zengyixuan
	Language: C++
	Result: Accepted
	Time:10 ms
	Memory:2072 kb
****************************************************************/