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