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