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