#include<stdio.h>

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