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