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: stair masters for exercise
Product list:
A: Womens Health Mens Health Bluetooth Cardio Stair Stepper with Adjustable Resistance Bands and with MyCloudFitness App, Black
B: Sunny Health & Fitness Premium Cardio Climber Stepping Elliptical Machine - SF-E3919, Black
Answer: B,A