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