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