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