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