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