#include <bits/stdc++.h>
using namespace std;
void solve(string N) {
  long long count = N.size();
  if (N[count] == 2 || N[count] == 4 || N[count] == 5 || N[count] == 7 ||
      N[count] == 9) {
    cout << "hon" << endl;
  } else if (N[count] == 0 || N[count] == 1 || N[count] == 6 || N[count] == 8) {
    cout << "pon" << endl;
  } else {
    cout << "bon" << endl;
  }
}
int main() {
  string N;
  cin >> N;
  solve(N);
  return 0;
}
