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