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: good halloween costumes for boys
Product list:
A: Raxwalker Plague Doctor Bird Mask Long Nose Beak Cosplay Steampunk Halloween Costume Props (Black)
B: Spooktacular Creations Boys Ninja Deluxe Costume for Kids (S 5-7)
Answer: B,A