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