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