Open-ended - With worked solutions · SET 20 Question 50

Use the key to decode the message. A code such as 2C means column 2, row C. Spaces separate words.
2C,8A,5A 6B,5B,3B,7C 5C,1A,7C 2C,6B 6A,1A,9A,3B 9A,1C 2C,6B 7A,9A,4C,5A 3C,7B