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