#include<stdio.h>

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