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