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