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