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