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: nathan vaporair 7l 2.0
Product list:
A: Nathan Hydration Insulated Running Belt Trail Mix Plus - Adjustable Running Belt  TrailMix Includes 2 Insulated Bottles/Flask  with Storage Pockets. Fits Most iPhones (One Size, Black)
B: Nathan VaporAir Hydration Pack Running Vest w/ 2L Bladder
Answer: B,A