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