import java.util.Scanner;
class At_Coder_01 {
  public static void main(String args[]) throws Exception {       
    Scanner s = new Scanner(System.in);
    int N = s.nextInt();
    int a = N % 10;
    if (a == 2 || a == 4 || a == 5 || a == 7 || a == 9) System.out.println("hon");
    else if (a == 0 || a == 1 || a == 6 || a == 8) System.out.println("pon");
    else System.out.println("bon");
  }
}