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