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