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


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