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