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