#include <stdio.h>

int main()
{
	int n;
	scanf("%d",&n);

	n %= 10;
	if(n == 2 || n == 4 || n== 5 || n==7 || n==9){
		printf("hon");
	}
	else if(n == 0 || n == 1 || n == 6 || n==8){
		printf("pon");
	}
	else{
		printf("bon");
	}
	
	return 0;
}
