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: obersee preschool backpack
Product list:
A: Toddler Pre School Backpack Boy&girl's Red Wine Book Bag
B: Kids Travel Toiletries Bag, Personal Organizer for Bathroom and Shower Needs (Racecar) - Obersee
Answer: A,B