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