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