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