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