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