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