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