#include <stdio.h>
#include<string.h>
int main() {
    char nums[1000]={0};
    gets(nums);
    int left = 0,right = strlen(nums)-1;
    while(left<right)
    {
        char temp = nums[left];
        nums[left] = nums[right];
        nums[right]  = temp;
        left++;
        right--;
    }
    printf("%s",nums);
}