import java.util.Scanner;
public class First {
public static void main(String[] args) {
boolean result;
Scanner in = new Scanner(System.in);
int a = in.nextInt();
result = isprime(a);
if (result==false) {
System.out.println("shi");
} else
System.out.println("fou");
}
public static boolean isprime(int a) {
boolean flag =false;
long b = Math.round(Math.sqrt(a));
if (b == 2) {
return true;
}
for (int c = 3; c <= b; c++) {
if (a % c == 0) {
return false;
}
}
return flag;
}
}