Instruction: Analyze the query and each product title. Sort the products in descending order based on their relevance to the query. The most relevant product should be at the top of the list, and output the ranked list.

Input:
Query: stair climbing wheelchair
Product list:
A: Porto Mobility 2021 Ranger Weatherproof Super Lightweight Foldable Sturdy Dual Motorized Powerful Electric Wheelchair(Airplane Ready)
B: Sentire Med Deluxe Electric Wheelchair for Adults, 600 W Peak Power Motor - Ultra Lightweight Design Foldable, Compact and Portable - Ideal Motorized Mobility Solution for Travel and All Terrain Use
Answer: B,A