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