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