import java.util.*;
 
public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();

    N = N % 10;
    if(N==3) {
      System.out.println("bon");
    } else if(N==0 || N==1 || N==6 || N==8) {
      System.out.println("pon");
    } else {
      System.out.println("hon");
    }
  }
}