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: 6x4 envelopes for invitations
Product list:
A: 4" x 6" Envelopes for Invitations - Bright White A6 Envelopes (4 3/4" x 6 1/2") - Square Booklet Flap (100 Envelopes)
B: Quality Park 4 x 6 Photo Envelopes, Self-Sealing, for Photos, Invitations and Announcements, 24 lb White Wove, 4-1/2 x 6-1/4 Inches, 50 per Box (QUA10742)
Answer: B,A