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