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