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