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: blue galaxy backpack
Product list:
A: Galaxy Backpack Bookbag for School College Student Travel Business with USB Charging Port Fit Laptop Up to 15.6 Inch Anti theft Night Light Reflective Chest Straps (Galaxy Blue A)
B: PUMA Kids' Little Boys' Logo, Backpack Black/Blue, Youth Size
Answer: A,B