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