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