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