#include <bits/stdc++.h>
using namespace std;

int main(){
  int n;
  
  cin >> n;
  
  switch(n%10){
      case:2
      case:4
      case:5
      case:7
      case:9
        cout << "hon" << endl;
      	break;
      case:0
      case:1
      case:6
      case:8
        cout << "pon" << end;
        break;
      case:3
        cout << "bon" << end;
        break;
  }
  return 0;
}