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