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