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