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