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