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