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