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: speedflex helmet football adult
Product list:
A: Xenith Shadow XR Youth Black Football Helmet w/Black XRS-22SX Facemask & Black Chin Strap - Large
B: Riddell SpeedFlex Adult Football Helmet with Facemask
Answer: B,A