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