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