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