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