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