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: robot vacuum without wifi
Product list:
A: iRobot Roomba 614 Robot Vacuum- Good for Pet Hair, Carpets, Hard Floors, Self-Charging
B: Coredy R750 Robot Vacuum Cleaner, Compatible with Alexa, Mopping System, Boost Intellect, Virtual Boundary Supported, 2200Pa Suction, Super-Thin, Upgraded Robotic Vacuums, Cleans Hard Floor to Carpet
Answer: A,B