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