#include <stdio.h>
int main() {
	int a, b;
	int c = 0;
	scanf("%d.&d", &a, &b);
	if (a >= 100 && a < 1000) {
		while (a != 0) {
			c =  c * 10 + a % 10;
			a = a / 10;
		}
	}
	printf("%d.%d\n", b, c);
	return 0;
}