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