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