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