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