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