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