#include<iostream>
#include<algorithm>
#include<cstring>
#include<cmath>
#include<string>
using namespace std;
int main(){
	char a[1001]={};
	cin>>a;
	int z=strlen(a);
	for(int i=z;i>=0;i--){
	    cout<<a[i];
	}
	return 0;
}