import java.util.*;

public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);

    int n = sc.nextInt();
    String ans = "hon";

    if(n % 10 == 3){
      ans = "bon";
    } else if(n % 10 == 0 || n % 10 == 1 || n % 10 == 6 || n % 10 == 8){
      ans = "pon";
    }

    System.out.println(ans);
  }
}
