A stack is cut out so that the pins on the packages and one edge of the grids are flush with {HEAD ~ faces} of {TAIL ~ the stack}  
of
A stack is cut out so that the pins on the packages and one edge of the grids are flush with { HEAD ~ faces } of { TAIL ~ the stack }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH