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