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

void perevorotor(char * s) {
    int i = 0;
    char c;
    int len;
    len = strlen(s);
    while (s[i+1]) {
        c = s[i];
        s[i] = s[len -i -1];
        s[len -i -1] = c;
        i++;
    }
    s[i+1] = '\0';
}

int main () {
    char str[30];
    scanf("%s", str);
    perevorotor(str);
    printf("%s\n", str);
    return 0;
}