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