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