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: morning complete prebiotic
Product list:
A: Amazing Grass Greens Blend Antioxidant: Super Greens Powder with Spirulina, Beet Root Powder, Elderberry & Probiotics, Sweet Berry, 60 Servings (Packaging May Vary)
B: Vitamin Bounty - Pro 50 Probiotic - 13 Probiotic Strains, 50 Billion Organisms Per Serving (1 Pack)
Answer: B,A