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