import java.util.Scanner;
public class PrimeNo {
public static void main(String[] args) {
Scanner sc=new Scanner(System.in);
int n=sc.nextInt();
int temp=0;
for(int i=2;i<=n-1;i++)
{
if(n%i==0)
{
temp=temp+1;
}
}
if(temp==0)
{
System.out.println("prime no");
}
else
{
System.out.println("not a prime no");
}
}
}
