Who would you put in your human centipede?

For you poor souls that don't know the human centipede 3 is a family friendly thought provoking masterpiece about a prison guard who after trials and tribulations dealing with highly dangerous criminals is approached by the director of the original human centipede and together they come to a decent conclusion: Making a human centipede out of all the prisoners by connecting each of them mouth to ass, efficiently cutting down the cost of food as they now only share one digestive track.