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