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