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