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