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