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==2||N==4||N==5||N==7||N==9){
			System.out.println("hon");
        }else if(N==0||N==1||N==6||N==8){
			System.out.println("pon");
        }else{
			System.out.println("bon");
        }
    }
}
