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