{TAIL ~ System} for adapting the resonant operation of {HEAD ~ a personal care appliance} during the lifetime thereof 
{ TAIL ~ System } for adapting the resonant operation of { HEAD ~ a personal care appliance } during the lifetime thereof
TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH