{HEAD ~ A method} for forming multi layered fiber including a core, {TAIL ~ a first layer}, and a second layer 
{ HEAD ~ A method } for forming multi layered fiber including a core , { TAIL ~ a first layer } , and a second layer
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH