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