The edges other than the reference edge can then be draped by unfolding one of {HEAD ~ the stacks} of {TAIL ~ panels} to cover them 
of
The edges other than the reference edge can then be draped by unfolding one of { HEAD ~ the stacks } of { TAIL ~ panels } to cover them
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH