#include<stdio.h>

int main () {
  int N;
  scanf("%d", &N); N %= 10;
  if (N == 3)
    puts("bon");
  else if (N == 0 || N == 1 || N == 6 || N == 8)
    puts("pon");
  else
    puts("hon");
  return 0;
}