Instruction: Analyze the query and each product title. Sort the products in descending order based on their relevance to the query. The most relevant product should be at the top of the list, and output the ranked list.

Input:
Query: unlimited echo
Product list:
A: Ooma Telo Free Home Phone Service. Works with Amazon Echo and Smart Devices (Renewed)
B: VPN for Fire TV (Fast, Secure & Reliable)
Answer: A,B