#include <stdio.h>

int main(void) {
	int a = 0, b = 0;
    scanf("%d", &a);
    //a = (a < 0) ? -a : a;

    while (a) {
        b = b * 10 + (a % 10);
        a /= 10;
    }

    printf("%d\n", b);
	return 0;
}