c) grasping the working end of {HEAD ~ the flexible tube} with {TAIL ~ the first and second jaws} 
c ) grasping the working end of { HEAD ~ the flexible tube } with { TAIL ~ the first and second jaws }
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL