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