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