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: smart lock installation service
Product list:
A: ecobee3 Smarter Wi-Fi Thermostat with Remote Sensor, 2nd Generation
B: Keypad or Electronic Lock Installation
Answer: B,A