#include <bits/stdc++.h>
int main(void) {
  int t;
  scanf("%d", &t);
  t = t / 10;
  int n = t % 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");
}
