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: generator with automatic transfer switch
Product list:
A: Elkhart (LPT50BRD 50 Amp Automatic Transfer Switch
B: GAEYAELE W2R Mini ATS 2P Automatic Transfer Switch Electrical Selector Switches Dual Power Switch Din Rail Type ATS 63A 100A (W2R 2P 100A)
Answer: B,A