#include <iostream>
using namespace std;

int main()
{
    int N;
   cin >> N;
  
  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;
}