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