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