#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;
}
