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