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