One of skill in the art should also understand that the first roll could also include {HEAD ~ more than two different types} of {TAIL ~ elements}, and that the disclosure of a first and second element is meant to be illustrative, rather than limiting 
of
One of skill in the art should also understand that the first roll could also include { HEAD ~ more than two different types } of { TAIL ~ elements } , and that the disclosure of a first and second element is meant to be illustrative , rather than limiting
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH