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