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