Instruction: Evaluate the relevance of each product title in the input to the given query, and then sort the products in descending order of relevance, placing the most relevant product at the top of the ranked list.

Input:
Query: pens blue and black
Product list:
A: Paper Mate Profile Retractable Ballpoint Pens 12 count
B: BIC Round Stic Grip Xtra Comfort Ballpoint Pen, Medium Point (1.2mm), Black & Blue, Soft Grip For Added Comfort And Control, 36-Count
Answer: B,A