Your goal is to find the secret four-color code. The following colors are possible: green, red, blue, yellow, brown, purple.
Some guesses have already been made. I will provide feedback for each guess made with which it is possible to unambigiously determine the secret code.

Previous Guesses:
Guess: ['yellow', 'blue', 'purple', 'brown']. Hint: two colors are in the correct positions.
Guess: ['green', 'blue', 'blue', 'yellow']. Hint: two colors are in the secret code but in the wrong positions.
Guess: ['red', 'green', 'brown', 'brown']. Hint: two colors are in the secret code but in the wrong positions.
A B C D
red, yellow, blue, yellow yellow, red, purple, green purple, purple, red, green purple, purple, red, blue