#include <stdio.h>
#include <iostream>
#include <string.h>


using namespace std;

int main() {
int kazu;
char rin[21];
scanf("%s",rin);
	
	kazu = strlen(rin);
	
	for(int i = kazu-1; i >= 0; i--) {
	 cout << rin[i];
	}
	
	cout << "\n";
	
    return 0;
}