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