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