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