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