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