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