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