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