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