#include <stdio.h>

int main(void){
	int N, a;
	scanf("%d", &N);
    a = N % 10;
    
    if(a == 3){
    	printf("bon\n");
    }
    else if(a == 0 || a == 1 || a == 6 || a == 8){
    	printf("pon\n");
    }
    else {
    	printf("hon\n");
    }
    return 0;
}