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