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