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