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