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