If {TAIL ~ exposure} of all of the pattern portions of {HEAD ~ the die} are successfully completed, then processing is terminated 
If { TAIL ~ exposure } of all of the pattern portions of { HEAD ~ the die } are successfully completed , then processing is terminated
OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH