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