#include <stdio.h>

int main()
{
  int N,n;
  scanf("%d",&N);

  n = N%10;

  if(n == 3)
    printf("bon");
  else if (n == 0 || n == 1 || n == 6 || n == 8)
    printf("pon");
  else
    printf("hon");

  return 0;
}
