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