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