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