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