{HEAD ~ The second development unit} forms {TAIL ~ a second developer image} with a second developer permeating the light having prescribed wavelength therethrough 
forms
{ HEAD ~ The second development unit } forms { TAIL ~ a second developer image } with a second developer permeating the light having prescribed wavelength therethrough
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH