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