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