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: portable septic tank for rv 28 gallon
Product list:
A: SmartTote2 RV Portable Waste Tote Tank - 4 Wheels - 35 Gallon - Thetford 40519 , Silver
B: Camco Rhino Heavy Duty 28 Gallon Portable RV Waste Holding Tank with Hose and Accessories - Durable Leak Free and Odorless Rv Tote Tank (39004)
Answer: B,A