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