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: hoverboard plain black
Product list:
A: Hoverboard Two-Wheel Self Balancing Electric Scooter 8" Hummer Auto Self Balancing Wheel Electric Scooter with Built-in Bluetooth Speaker UL 2272 Certified (Red/Black)
B: EPCTEK Hoverboard,6.5" Two-Wheel Self-Balancing Hover Board with Bluetooth Speakers and Fashion LED Lights for Kids and Adults(A18 White)
Answer: B,A