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