#include <iostream>
using namespace std;

int main() {
	int num, a, b, c, d;
	cin >> num;
	a = num % 10;
	b = num / 10 % 10;
	c = num / 100 % 10;
	d = num / 1000;
	cout << a<< b << c << d;
	return 0;
}