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