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