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