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: stem for 5 year old boys
Product list:
A: Selieve Toys for 3-12 Year Old Boys Girls, Walkie Talkies for Kids 22 Channels 2 Way Radio Toy with Backlit LCD Flashlight, 3 Miles Range for Outside, Camping, Hiking
B: Learning Resources Botley the Coding Robot Activity Set, Screen-Free Coding Robot for Kids, STEM Toy, Programming for Kids, 77 Pieces, Ages 5+
C: STEM Toys for Kids - 5-in-1 Building Projects Set for 6 7 8 9+ Year Old Boys & Girls That Love to Build  Creative Construction Stem Learning Engineering Gift for Birthday Christmas
Answer: B,C,A