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