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