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