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