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