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