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