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