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