#include <stdio.h>
#include <string.h>

int main()
{
	int n;

	scanf("%d", &n);

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