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