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