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