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