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