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