#include <stdio.h>
int main(void)
{
int number;
int reverse(int number);
scanf("%d",&number);
printf("%d",reverse(number));
}
int reverse(int number)
{
int a;
scanf("%d",&number);
while(number>=1)
{
a=number%10;
printf("%d",a);
number/=10;
}
return 0;
}