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: power plug flat adapter
Product list:
A: USB Wall Charger, Surge Protector, POWRUI 6-Outlet Extender with 2 USB Charging Ports (2.4A Total) and Night Light, 3-Sided Power Strip with Adapter Spaced Outlets - White,ETL Listed
B: ALLWEI International Travel Adapter 220V to 110V Step Down Power Voltage Converter for Hair Straightener/Curling Iron, Universal Power Plug Adapter UK, US, AU, EU, IT, India ...
C: Unidapt EU Europe to US USA Travel Plug Adapter Power Converter AC (Pack of 2)
Answer: C,B,A