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