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