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