{HEAD ~ Information processing apparatus} indicating {TAIL ~ a sleep state} and a ready state of printing apparatuses 
indicating
{ HEAD ~ Information processing apparatus } indicating { TAIL ~ a sleep state } and a ready state of printing apparatuses
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH