#include<stdio.h>

int main(void){
	int n,m;
	scanf("%d",&n);
	m=n%10;
	if(m==2||m==4||m==5||m==7||m==9){
		printf("hon");
		return 0;
	}else if(m==0||m==1||m==6||m==8){
		printf("pon");
		return 0;
	}else{
		printf("bon");
		return 0;
	}
}