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