#include <bits/stdc++.h>
int main() {
  int N, n;
  scanf("%d", N);
  if (N > 999 || N < 1) return 0;
  n = N % 10;
  if (n == 2 || n == 4 || n == 5 || n == 7 || n == 9) printf("hon\n");
  if (n == 0 || n == 1 || n == 6 || n == 8) printf("pon\n");
  if (n == 3) printf("bon\n");
  return 0;
}
