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