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