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