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