#include <stdio.h>
void reverse_string(char *str) {
// Your logic here
int len=0;
while(*(str + len) != '\0')
{
len++;
}
int left =0,right =len-1;
while(left<right)
{
int temp = *(str+left);
*(str+left) = *(str+right);
*(str+right) = temp;
right--;
left++;
}
}
int main() {
char str[101];
fgets(str, sizeof(str), stdin);
// Remove newline
int i = 0;
while (str[i] != '\0') {
if (str[i] == '\n') {
str[i] = '\0';
break;
}
i++;
}
reverse_string(str);
printf("%s", str);
return 0;
}