import java.util.Scanner;
class Main{
	public static void main(String[] args){
    Scanner sr = new Scanner(System.in);
    	int N = sr.nextInt();
        int f = N % 10;
        if(f==2 || f==4|| f==5 || f==7 || f==9)
        	System.out.println("hon");
        else if(f==0 || f==1 || f==6 || f==8)
        	System.out.println("pon");
        else 
        	System.out.println("bon");    
     }
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz