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