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