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