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