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