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