The strip of {HEAD ~ staples} 11 has {TAIL ~ a frontmost staple} 23, and following staples 24 
The strip of { HEAD ~ staples } 11 has { TAIL ~ a frontmost staple } 23 , and following staples 24
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH