{HEAD ~ The invention} further comprises {TAIL ~ a method} for switching of wavelength channels through the use of said multi wavelength selective switch 
comprises
{ HEAD ~ The invention } further comprises { TAIL ~ a method } for switching of wavelength channels through the use of said multi wavelength selective switch
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH