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