Instruction: Evaluate each product title in the given list, assess its relevance to the given query, and then arrange the products in descending order of relevance, with the most relevant product at the top of the ranked list.

Input:
Query: 10 open window envelopes without plastic window
Product list:
A: 500 No. 9 Flip and Seal Double Window Security Envelopes - Designed for Quickbooks Invoices and Business Statements with Self Seal Flip Press and Seal Flap -Number 9 Size 3 7/8 Inch X 8 7/8 Inch
B: Quality Park #6 3/4 Security-Tinted Envelopes with Peel & Seal, 100-Pack, White  QUA10417
Answer: B,A