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