{TAIL ~ The additional cost} in the assembly is negligible in view of the advantages of {HEAD ~ the modular construction} 
{ TAIL ~ The additional cost } in the assembly is negligible in view of the advantages of { HEAD ~ the modular construction }
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD