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