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