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