The number of bits in each submask equates to {HEAD ~ the number} of {TAIL ~ exit ports} in fabrics 602 and 604 
of
The number of bits in each submask equates to { HEAD ~ the number } of { TAIL ~ exit ports } in fabrics 602 and 604
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH