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: rv water pump camper
Product list:
A: ALL NEW SEAFLO 55-Series Diaphragm Pump - 12V DC, 5.5 GPM, 60 PSI with HEAVY DUTY PRESSURE SWITCH
B: NEW 12V WATER PRESSURE DIAPHRAGM PUMP 4.5GPM 17 L/MIN 40 PSI Caravan/RV/Boat/Marine
Answer: B,A