{HEAD ~ The signal} supplied to the light intensity control circuit D is derived from {TAIL ~ the adder} 9 
is derived from
{ HEAD ~ The signal } supplied to the light intensity control circuit D is derived from { TAIL ~ the adder } 9
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH