#include <bits/stdc++.h>
using namespace std;
const int N = 2e5 + 10;
int main() {
  int n;
  n %= 10;
  if (n == 2 || n == 4 || n == 5 || n == 7 || n == 9)
    printf("hon\n");
  else if (n == 1 || n == 0 || n == 6 || n == 8)
    printf("pon\n");
  else
    printf("bon\n");
  return 0;
}
