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