#include <bits/stdc++.h>
using namespace std;
void printA(int *A, int size) {
  for (int i = 0; i < size; i++) cout << A[i] << " ";
}
void scanA(int *A, int size) {
  for (int i = 0; i < size; i++) cin >> A[i];
}
int absolute(int a, int b);
int main() {
  int n;
  cin >> n;
  if (n >= 100) {
    n /= 100;
  } else if (n >= 10 && n <= 99)
    n /= 10;
  if (n == 3)
    printf("bon");
  else if (n == 1 || n == 6 || n == 8 || n == 0)
    printf("pon");
  else
    printf("hon");
}
