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