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