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