{TAIL ~ A dual master}, formed with {HEAD ~ a first and a second image}, is wrapped round the print drum of the upstream printing section 
{ TAIL ~ A dual master } , formed with { HEAD ~ a first and a second image } , is wrapped round the print drum of the upstream printing section
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH