Your goal is to find the secret four-color code. The following colors are possible: black, brown, purple, blue, yellow, green.
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: ['brown', 'blue', 'purple', 'yellow']. Hint: three colors are in the secret code but in the wrong positions.
Guess: ['black', 'brown', 'brown', 'purple']. Hint: three colors are in the secret code but in the wrong positions.
Guess: ['purple', 'black', 'blue', 'brown']. Hint: two colors are in the correct positions and one color is in the secret code but in the wrong positions.
A B C D
purple, yellow, black, brown blue, brown, green, purple blue, blue, blue, yellow brown, purple, black, yellow