The only difference being that with the modified first embodiment compaction to move the upright portion UP1 of {HEAD ~ the face mats} must be sufficient to move {TAIL ~ the face mats} to a vertical disposition 
The only difference being that with the modified first embodiment compaction to move the upright portion UP1 of { HEAD ~ the face mats } must be sufficient to move { TAIL ~ the face mats } to a vertical disposition
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH