import java.util.Scanner;
public class Main{

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
      //数字の数を入力
		String n = sc.next();
	//n
      int len = n.length();
      switch(n.charAt(len -1 )){
          case:"2"
            case "4":
        case "5":
        case "7":
                  case:"9"
                    System.out.println("hon");break;
                    case:"0"
                      case:"1"
                        case:"6"
                          case:"8"
                            System.out.println("pon");break;
                            case:"3"
                              System.out.println("bon");break;
                              
                            
      }
      
	}

}
