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.

Prompt: Thanks for the small flat rate priority boxes. I'll remember to use 
Completion A: one for each order and they are great choices for a few months. So a flat rate package? We'll let you know the next time you receive 
Completion B: those for the other priority boxes. I'll also do the "first letter of the alphabet" priority. I've also put together my preferred priority bo
Completion A