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