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