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