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