Instruction: Evaluate the relevance of each product title in the input to the given query, and then sort the products in descending order of relevance, placing the most relevant product at the top of the ranked list.

Input:
Query: livestock water heater
Product list:
A: Farm Innovators Model C-500 Submergible Cast Aluminum "Around The Farm" Utility De-Icer, 500-Watt
B: API Heated Bucket Heated Round Bucket, 16 Gallon (Item No. 16HB)
C: Allied Precision 7621 1000-Watt Floating De-Icer
Answer: C,B,A