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