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