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