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