Thus it becomes imperative that {TAIL ~ the foam sheet samples} be severed by {HEAD ~ means} of a thin cutting blade such as a razor blade 
Thus it becomes imperative that { TAIL ~ the foam sheet samples } be severed by { HEAD ~ means } of a thin cutting blade such as a razor blade
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH