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