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