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