{HEAD ~ The secondary PAN} has {TAIL ~ end portions}, and at least one of the end portions is the same as the primary PAN 
{ HEAD ~ The secondary PAN } has { TAIL ~ end portions } , and at least one of the end portions is the same as the primary PAN
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH