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