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