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