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