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