Technical interview: Interviewer: Ok, so you have only 4 boards here and two nails, can you figure out a way to make a standing pyramid that won't fall over? C

Technical interview: Interviewer: Ok, so you have only 4 boards here and two nails, can you figure out a way to make a standing pyramid that won't fall over? Carpenter: Will I be building pyramids or is there a limit to how many nails we'll have during construction? Interviewer: No, but we want to assess your critical thinking skills. Carpenter: (Arranges Pyramid) Ok, I think its done. Interviewer: Hm... ok well it was kinda slow, but I guess you did ok. Alright, next question. You have 100 boards, for every one that is fir, say "Fir", and for everyone that is Birch say "Birch", and for any that are both "Fir" and "Birch"...