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: msr stoves backpacking
Product list:
A: MSR Reactor Cooking Pot, 1.7-Liter
B: MSR Flex 4 Cook Set Complete Cooking System for Camping Families and Groups
Answer: B,A