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