Instruction: Given a query and a list of products denoted as A, B, C, ... with their titles, rank the products according to their relevance to the query. Output only a ranked list in which the most relevant product is at the top of the list.

Input:
Query: propane fireplace vent free
Product list:
A: Touchstone 80011 - The Sideline Electric Fireplace - 60 Inch Wide - in Wall Recessed - 5 Flame Settings - Realistic 3 Color Flame - 1500/750 Watt Heater - (Black) - Log & Crystal Hearth Options
B: B-HOTTE Gas Fireplace Logs,4/5pcs Ceramic Wood Logs for All Types of Indoor, Gas Inserts, Ventless & Vent Free, Ethanol, Electric, Propane or Outdoor Fireplaces & Fire Pits, Burning Accessories (4PCS)
C: Hearth Products Controls Maxitrol Flame Modulating Safety Pilot Kit with Remote Control (MVRC255), Natural Gas
Answer: A,B,C