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