Instruction: Analyze the query and each product title. Sort the products in descending order based on their relevance to the query. The most relevant product should be at the top of the list, and output the ranked list.

Input:
Query: register this kindle
Product list:
A: HOW TO ADD A KINDLE TO MY AMAZON ACCOUNT: Simple Step By Step Guide On How To Register And Remove Kindle Device (With Screenshots). A 2019 Quick Guide
B: 15-Minute Market Research for Affiliates: How to Make Quick Money with Affiliate Marketing by Finding Untapped, Low Competition Niches You Can Take Over ... Out of the Gate (Digital Marketing Book 1)
Answer: A,B