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