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