#include <stdio.h>
#include<string.h>
void reverse_string(char *str) {
// Your logic here
int low =0 ;
int high = strlen(str)-1;
while(low<high)
{
str[low]^=str[high];
str[high]^=str[low];
str[low]^=str[high];
low++;
high--;
}
}
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;
}