#include <stdio.h>
void reverse_string(char *str) {
// Your logic here
int i = 0,j=0;
while (str[i] != '\0') {
i++;
}
while(j < i-1){
char temp = str[j];
str[j] = str[i-1];
str[i-1] = temp;
j++;
i--;
}
//printf("%s\n", str);
}
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;
}