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