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: bass amp headphones
Product list:
A: Positive Grid Spark +HD 200 Pro Studio Headphones Bundle
B: MILISTEN Guitar Bass Headphone Amplifier Mini Guitar Amp Recorder Speaker for Acoustic Electric Guitar Accessories
Answer: B,A