#include<stdio.h>
int main(void){
  int n;
  scanf("%d",&n);
  switch(n%10){
    case 2:
    case 4:
    case 5:
    case 7:
    case 9:
      printf("hon");
      break;
    case 0:
    case 1:
    case 6:
    case 8:
      printf("pon");
      break;
    case 3:
      printf("bon");
      break;
  }
  return 0;