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