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