{TAIL ~ The resonator} includes {HEAD ~ at least four mirrors}, a first, a second, a third, and a fourth mirror 
{ TAIL ~ The resonator } includes { HEAD ~ at least four mirrors } , a first , a second , a third , and a fourth mirror
TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH