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