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