#include <stdio.h>
int main(void){
    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");
    }
        return 0;
}