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