Your goal is to find the secret four-color code. The following colors are possible: white, yellow, green, blue, brown, red.
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', 'white', 'green']. Hint: three colors are in the secret code but in the wrong positions.
Guess: ['white', 'white', 'yellow', 'brown']. Hint: three colors are in the correct positions.
Guess: ['green', 'white', 'yellow', '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
red, green, yellow, red white, green, yellow, brown blue, red, red, green red, brown, white, blue