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