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