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