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