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