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