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