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