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