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