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