Task: Query_Product_Rank
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: obersee preschool backpack
Product list:
A: Kids Travel Toiletries Bag, Personal Organizer for Bathroom and Shower Needs (Racecar) - Obersee
B: Obersee Kids Pre-School All-in-One Backpack with Cooler, Dinos by Obersee
Answer: B,A