#include <bits/stdc++.h>
int main() {
  int n = 1, s;
  while (n >= 0) {
    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;
}
