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