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