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