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