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