#include<stdio.h>

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