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