#include <bits/stdc++.h>
int main() {
  int n;
  scanf("%d", &n);
  if (n % 10 == 2 || n % 10 == 4 || n % 10 == 5 || n % 10 == 7 || n % 10 == 9)
    puts("hon");
  if (n % 10 == 0 || n % 10 == 2 || n % 10 == 6 || n % 10 == 8) puts("pon");
  if (n % 10 == 3) puts("bon");
  return 0;
}
