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