human
The simple phrase “last is first” indicates two things about the words. That the word “last” is the first in the sentence, also that the word “first” is the last word. Can you make a few other phrases like that? 
gpt
--- Reasoning ---
1. Is the question multiple-choice question?
No
2. Is it implied multiple-choice question?
No
3. If two experts were independently asked the question, will the final answer be exactly the same?
No

--- Answer ---
open