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