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