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