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