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