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