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