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