#include <stdio.h>
void reverse_string(char *str) {
// Your logic here
int count=0;
while(*(str+count) != '\0'){
count ++;
}
count--;
char temp;
int i=0;
while (i <= (count/2)){
temp = *(str+i);
*(str+i) = *(str+(count -i));
*(str+count-i) = temp;
i++;
}
}
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;
}