In {TAIL ~ a preferred embodiment}, {HEAD ~ the first roll} includes a plurality of first and second elements arranged in a pattern 
In
In { TAIL ~ a preferred embodiment } , { HEAD ~ the first roll } includes a plurality of first and second elements arranged in a pattern
REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH