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