{TAIL ~ A device} is provided which includes an activity sensor, {HEAD ~ a communication portion}, and a route suggesting portion 
{ TAIL ~ A device } is provided which includes an activity sensor , { HEAD ~ a communication portion } , and a route suggesting portion
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH