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