#include<bits/stdc++.h>
using namespace std;
int main(){
	int a,d=0,n;
	cin>>n;
	while(n!=0){
		a=n%10;
		n=n/10;
		d=d*10+a;
	} cout<<d;
	return 0;	
}
/**************************************************************
	Problem: 1121
	User: zhuangwenya
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/