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