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