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