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: breathelizer key chain
Product list:
A: BACtrack C8 Breathalyzer | Professional-Grade Accuracy | Optional Wireless Smartphone Connectivity | Compatible w/ Apple iPhone, Google & Samsung Android Devices | Apple HealthKit Integration
B: Aproca Hard Storage Travel Case for BACtrack C6 Keychain Breathalyzer(only case)
Answer: A,B