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