#include <bits/stdc++.h>
using namespace std;
template <typename T>
inline void read(T &x) {
  x = 0;
  int f = 1;
  char ch = getchar();
  while (ch < '0' || ch > '9') {
    if (ch == '-') f = -1;
    ch = getchar();
  }
  while (ch >= '0' && ch <= '9') x = x * 10 + (ch ^ 48), ch = getchar();
  x *= f;
  return;
}
template <typename T>
void write(T x) {
  if (x < 0) putchar('-'), x = -x;
  if (x >= 10) write(x / 10);
  putchar(x % 10 + '0');
  return;
}
int main() {
  int n;
  cin >> n;
  n %= 10;
  if (n == 2 || n == 4 || n == 5 || n == 7 || n == 9)
    cout << "hon" << endl;
  else if (n == 0 || n == 1 || n == 6 || n == 8)
    cout << "pon" << endl;
  else
    cout << "bon" << endl;
  return 0;
}
