#include <stdio.h>
void reverse_string(char *str) {
// Your logic here
int count=0;
int j=0;
while (*(str+j)!='\0'){
count++;
j++;
}
for(int i=0;i<count/2;i++){
char temp = *(str+i);
*(str+i) = *(str+(count-1-i));
*(str+(count-1-i)) = temp;
}
}
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;
}