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