#include <stdio.h>

int main(){
    int n;

    scanf("%d", &n);

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