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