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