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