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: ipads by apple on sale cheap
Product list:
A: Apple iPad Air (10.5-inch, Wi-Fi, 256GB) - Space Gray (3rd Generation)
B: Brydge 9.7 Wireless Keyboard Compatible with iPad 6th Gen (2018), iPad 5th Gen (2017), iPad Pro 9.7 inch, iPad Air 1, iPad Air 2 (Silver)
Answer: A,B