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