{HEAD ~ The length} in {TAIL ~ the food forward direction} of each of the separated chamber is equal to or longer than that of just before chamber 
in
{ HEAD ~ The length } in { TAIL ~ the food forward direction } of each of the separated chamber is equal to or longer than that of just before chamber
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH