Instruction: Evaluate each product title in the given list, assess its relevance to the given query, and then arrange the products in descending order of relevance, with the most relevant product at the top of the ranked list.

Input:
Query: trecking gear backpack with back support system
Product list:
A: Covacure Trekking Poles Collapsible Hiking Poles - Aluminum Alloy 7075 Trekking Sticks with Quick Lock System, Telescopic, Collapsible, Ultralight for Hiking, Camping
B: Columbia Unisex Silver Ridge III Daypack, Black, One Size
Answer: B,A