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