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