{HEAD ~ The set} includes {TAIL ~ an elongated flexible separation chamber} which is formed with at least one interface region thereon 
includes
{ HEAD ~ The set } includes { TAIL ~ an elongated flexible separation chamber } which is formed with at least one interface region thereon
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH