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