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