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