filling {TAIL ~ a plurality} of {HEAD ~ elongated tubular flexible plastic bag leg members} and closing off ends thereof after filling thereof 
filling { TAIL ~ a plurality } of { HEAD ~ elongated tubular flexible plastic bag leg members } and closing off ends thereof after filling thereof
OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH