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