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