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