set one or more soft limits to define {HEAD ~ a second range} within {TAIL ~ the first range}; and 
within
set one or more soft limits to define { HEAD ~ a second range } within { TAIL ~ the first range } ; and
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH