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