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