#include <stdio.h>
void reverse_string(char *str) {
// Your logic here
int len = 0 ;
int mid = 0 ;
char *tmp = str ;
while(*tmp)
{
len++;
tmp+=1;
}
mid = len/2 + len%2;
// printf("%d",mid);
for(int n = 0 ; n < mid ; n++)
{
char l = str[n];
str[n] = str[len-1-n];
str[len-1-n] = l;
}
}
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;
}