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