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