#include<stdio.h>
int main(void){
    char n[3];
    scanf("%s",&n);
    if(n[2] = '3'){
        printf("bon");
    }else if((n[2]='0')||(n[2]='1')||(n[2]='6')||(n[2]='8')){
        printf("pon");
    }else if((n[2]='2')||(n[2]='4')||(n[2]='5')||(n[2]='7')||(n[2]='9')){
        printf("hon");
    }
    return 0;
}