Instruction: Given a query and a list of products denoted as A, B, C, ... with their titles, rank the products according to their relevance to the query. Output only a ranked list in which the most relevant product is at the top of the 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
C: TAIBID Military Tactical Backpack Water Resistant Large Army 3 Day Assault Pack Molle Bug Out Bag Outdoors Hiking Hunting Backpacks, Black
Answer: B,C,A