Instruction: Rank the products A, B, C, ... based on their relevance to the provided query, and produce a ranked list with the most relevant product positioned at the top of the list.

Input:
Query: trecking gear backpack with back support system
Product list:
A: Columbia Unisex Silver Ridge III Daypack, Black, One Size
B: TAIBID Military Tactical Backpack Water Resistant Large Army 3 Day Assault Pack Molle Bug Out Bag Outdoors Hiking Hunting Backpacks, Black
Answer: A,B