{HEAD ~ Signal B} is inverted by {TAIL ~ inverter} 326 and subsequently presented to the inhibit input of one shot 312 and the s input of one shot 313 
is inverted by
{ HEAD ~ Signal B } is inverted by { TAIL ~ inverter } 326 and subsequently presented to the inhibit input of one shot 312 and the s input of one shot 313
HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH