#include <stdio.h>
#include <stdlib.h>

char *funkcja(char *ptr, int index) {
    char *array = malloc(sizeof(char) * index);

    int j = index - 1;
    for (int i = 0; i < index; i++)
        array[i] = ptr[j--];

    return array;
}

int main(void) {
    char array[100];
    char c;
    int index = 0;

    while ((c = getchar()) != '\n')
        array[index++] = c;

    char *new = funkcja(array, index);

    for (int i = 0; i < index; i++)
        putchar(new[i]);

    return 0;
}