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