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