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