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