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