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