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