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