{HEAD ~ The total weight} of several stems 112 and {TAIL ~ their flexible tips} 116 is less than the typical force required to press a key of a typical computer keyboard 
of
{ HEAD ~ The total weight } of several stems 112 and { TAIL ~ their flexible tips } 116 is less than the typical force required to press a key of a typical computer keyboard
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH