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