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