#include <stdio.h>
void reverse_string(char *str) {
// Your logic here
// get length
int length=0;
while (str[length] != '\0')
{
length ++;
}
for (int i=0 ; i < length / 2 ; i ++)
{
int start = str[i];
int end = str[length - 1 -i];
str[i] = end;
str[length - 1 -i] = start;
}
}
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;
}