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