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