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