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