Instruction: Evaluate the relevance of each product title in the input to the given query, and then sort the products in descending order of relevance, placing the most relevant product at the top of the ranked list.

Input:
Query: mechanical white gaming keyboard
Product list:
A: Havit Mechanical Keyboard and Mouse Combo RGB Gaming 104 Keys Blue Switches Wired USB Keyboards with Detachable Wrist Rest, Programmable Gaming Mouse for PC Gamer Computer Desktop (White)
B: MageGee Mechanical Gaming Keyboard with Blue Switch, Compact 87 Keys Wired Computer Keyboard for Windows Laptop PC Gamer, LED Ice Blue Backlit, White
Answer: B,A