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