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