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