import java.util.Scanner;
public class Main {
	public static void main(String[] args)throws Exception{
		Scanner stdIn=new Scanner(System.in);
		int N=stdIn.nextInt();
		if(N%10==2||N%10==4||N%10==5||N%10==7||N%10==9)
			System.out.println("hon");
		if(N%10==0||N%10==1||N%10==6||N%10==8)
			System.out.println("pon");
		if(N%10==3)
			System.out.println("bon");
	}
}
