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