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