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