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