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