A first region is “less significant” than a second region if {TAIL ~ the bits} included in {HEAD ~ the first region} are less significant than the bits in the second region 
A first region is “ less significant ” than a second region if { TAIL ~ the bits } included in { HEAD ~ the first region } are less significant than the bits in the second region
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH