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