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