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