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