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