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