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