According to one aspect, {TAIL ~ a multi layered fiber} containing {HEAD ~ a core}, a first layer, and a second layer is provided 
According to one aspect , { TAIL ~ a multi layered fiber } containing { HEAD ~ a core } , a first layer , and a second layer is provided
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH