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