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