{HEAD ~ The longitudinal opening} is wide enough for {TAIL ~ the paw} of a cat to easily fit therethrough 
is wide enough for
{ HEAD ~ The longitudinal opening } is wide enough for { TAIL ~ the paw } of a cat to easily fit therethrough
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH