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