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: rainbow six siege keyboard and mouse adapter
Product list:
A: havit Wired Gaming Keyboard Mouse Combo LED Rainbow Backlit Gaming Keyboard RGB Gaming Mouse Ergonomic Wrist Rest 104 Keys Keyboard Mouse 4800 DPI for Windows & Mac PC Gamers (Black)
B: Keyboard Mouse Controller Adapter Converter for PS4 PS3 Xbox One Switch PC - Black
Answer: B,A