Instruction: Evaluate each product title in the given list, assess its relevance to the given query, and then arrange the products in descending order of relevance, with the most relevant product at the top of the ranked list.

Input:
Query: diy air conditioner
Product list:
A: Cooper & Hunter 18,000 BTU Dual 2 Zone 12,000 + 12,000 BTU Wall Mount Ductless Mini Split AC/Heating System, Pre-Charged, Heat Pump, 21.3 SEER, Including 25FT Copper Line Set and Communication Wires
B: Pioneer Diamante Series Ductless Mini-Split Air Conditioner Inverter Heat Pump Full Set with 16 Ft. Kit
Answer: A,B