#include <bits/stdc++.h>
int main(void) {
  int a;
  scanf("%d", &a);
  if (a >= 10) {
    while (a < 10) {
      a -= 10;
    }
  }
  switch (a) {
    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;
    case 3:
      printf("bon\n");
      break;
  }
  return (0);
}
