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