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