Instructions: Given a prompt and two completions from a language model, select the completion that has the most similar style to the prompt. Style is defined as the tone, word choice, grammar, and sentence structure throughout the prompt-completion pair. If a prompt is colloquial, then the completion should also be colloquial, as opposed to a completion that is encyclopedic or overly formal. Generate either Completion A or Completion B.
Input: Prompt: Thanks for small flat rate priority boxes. I'll remember to use 
Completion A: this. 
Completion B: them. (Thanks to David for this.)So, how do we get this thing up to speed on time?Well, i
Output:
Completion B