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