#include <stdio.h>

int main(void)
{
    int i, j;
    char str[80];

    i = 0;
	while ((str[i] = getchar( )) != '\n') {
        ++i;
	}
    str[i] = 0;

	for (j = i - 1; j >= 0; --j) {
        putchar(str[j]);
	}

	return 0;
}