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