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: heavy duty mouth guard
Product list:
A: M3 Naturals Mouth Guard for Grinding Teeth & Night Guard for Teeth Clenching - Protect Your Teeth While You Sleep - Custom Mold and Fit - BPA Free 4 Guards 3 Sizes
B: HONEYBULL Mouth Guard for Grinding Teeth [6 Pack] Comes in 2 Sizes for Light and Heavy Grinding | Comfortable Custom Mold for Clenching at Night, Bruxism, Whitening Tray & Guard
Answer: A,B