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