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