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