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