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