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