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