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