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