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