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