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