{HEAD ~ The gas} combusted within {TAIL ~ the combustion chamber} through the above mentioned process is then rapidly removed from the combustion chamber 
combusted within
{ HEAD ~ The gas } combusted within { TAIL ~ the combustion chamber } through the above mentioned process is then rapidly removed from the combustion chamber
HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH