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: puma backpack for boys
Product list:
A: PUMA Kids' Little Boys' Logo, Backpack Black/Blue, Youth Size
B: PUMA Women's Dash Backpack
Answer: A,B