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