#include<stdio.h>
#include<iostream>
using namespace std;

int main(){
	char s[21];
	cin >> s;
	int len=strlen(s);

	for(int i=0;i<(len/2);i++){
		char c;
		c = s[i];
		s[i] = s[len-i-1];
		s[len-i-1] = c;
	}
	cout<<s<<"\n";
	system("pause");
return 0;
}