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