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