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