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