The response message reading part reads {HEAD ~ a response message} associated with {TAIL ~ the transmission period} per unit cost 
associated with
The response message reading part reads { HEAD ~ a response message } associated with { TAIL ~ the transmission period } per unit cost
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH