Instruction: Rank the products A, B, C, ... based on their relevance to the provided query, and produce a ranked list with the most relevant product positioned at the top of the list.

Input:
Query: plantronics hw520
Product list:
A: Plantronics HW261N Binaural Headset
B: Cisco Certified Plantronics EncorePro 520 Headset Bundle for Cisco 69xx, 78xx, 79xx, 89xx, 99xx Series
Answer: B,A