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