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