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: old lady costume for kids
Product list:
A: Luvable Friends baby girls and Cardigan Casual Dress, Blue Floral, 9-12 Months US
B: Colonial Girls Dress Prairie Pioneer Pilgrim Costume 14Y Color-1
Answer: B,A