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