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