#include<bits/stdc++.h>
using namespace std;
#define LL long long
const int N = 1e5 + 10;
const int INF = 0x3f3f3f3f;
char a[1000000];
int main()
{
	cin >> a;
	for ( int i = strlen(a) - 1 ; i >= 0 ; i-- )
	{
		cout << a[i];
	}
} 
//菜鸟驿站
//老六专属