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