{HEAD ~ A print system} includes {TAIL ~ a printer hub}, a shared printer and a shared MFP 
{ HEAD ~ A print system } includes { TAIL ~ a printer hub } , a shared printer and a shared MFP
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH