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