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