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