Instruction: Rank the products A, B, C, ... based on their relevance to the provided query, and produce a ranked list with the most relevant product positioned at the top of the list.

Input:
Query: solar powered pond waterfall
Product list:
A: MNP SP50 50W Powerful Twin Panel Solar Powered Submersible Pond Pump Kit 898 GPH. NO BATTERY. USA based support 7 days a week. ***SALE PRICE***
B: AISITIN 3.5W Solar Fountain Pump, Solar Water Pump Floating Fountain built-in 1500mAh Battery, with 6 Nozzles, for Bird Bath, Fish tank, Pond or Garden Decoration solar aerator pump
Answer: A,B