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