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