/*  ex3_1
    potter0723sw  */

#include <stdio.h>

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