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