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