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