#include <bits/stdc++.h>
int main() {
  int N;
  scanf("%d", &N);
  if (N <= 999 && N > 0) {
    if (N % 10 == 2 || N % 10 == 2 || N % 10 == 5 || N % 10 == 7 ||
        N % 10 == 9) {
      printf("%s\n", "hon");
    } else if (N % 10 == 0 || N % 10 == 1 || N % 10 == 6 || N % 10 == 8) {
      printf("%s\n", "pon");
    } else if (N % 10 == 3) {
      printf("%s\n", "bon");
    }
  }
  return 0;
}
