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: 5th wheel rail kit
Product list:
A: Reese Towpower 50081-58 Fifth Wheel Custom Quick Install Kit
B: CURT 16442 5th Wheel Installation Brackets, Select Ford F-150, Except Police Responder
Answer: A,B