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