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