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