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