#include <bits/stdc++.h>
using namespace std;
void __print(int x) { cout << x; }
void __print(long x) { cout << x; }
void __print(long long x) { cout << x; }
void __print(unsigned x) { cout << x; }
void __print(unsigned long x) { cout << x; }
void __print(unsigned long long x) { cout << x; }
void __print(float x) { cout << x; }
void __print(double x) { cout << x; }
void __print(long double x) { cout << x; }
void __print(char x) { cout << '\'' << x << '\''; }
void __print(const char *x) { cout << '\"' << x << '\"'; }
void __print(const string &x) { cout << '\"' << x << '\"'; }
void __print(bool x) { cout << (x ? "true" : "false"); }
template <typename T, typename V>
void __print(const pair<T, V> &x) {
  cout << '{';
  __print(x.first);
  cout << ',';
  __print(x.second);
  cout << '}';
}
template <typename T>
void __print(const T &x) {
  int f = 0;
  cout << '{';
  for (auto &i : x) cout << (f++ ? "," : ""), __print(i);
  cout << "}";
}
void _print() { cout << "]\n"; }
template <typename T, typename... V>
void _print(T t, V... v) {
  __print(t);
  if (sizeof...(v)) cout << ", ";
  _print(v...);
}
int32_t main() {
  {
    ios::sync_with_stdio(0);
    cin.tie(nullptr);
    cout.tie(nullptr);
  }
  string s;
  cin >> s;
  long long int n = s.size() - 1;
  if (s[n - 1] == '2' || s[n - 1] == '9' || s[n - 1] == '7' ||
      s[n - 1] == '5' || s[n - 1] == '4')
    cout << "hon";
  else if (s[n - 1] == '0' || s[n - 1] == '1' || s[n - 1] == '6' ||
           s[n - 1] == '8')
    cout << "pon";
  else
    cout << "bon";
  return 0;
}
