#include <stdio.h>
#include <stdlib.h>
#include <math.h>

int main(void)
{
  int n;

  scanf("%d",&n);

  switch(n%10)
  {
    case 2:
    case 4:
    case 5:
    case 7:
    case 9:
      printf("hon\n");
      break;
    case 0:
    case 1:
    case 6:
    case 8:
      printf("pon\n");
      break;
    default:
      printf("bon\n");
      break;
  }

  return 0;
}