{HEAD ~ The memory module} may include {TAIL ~ a printed circuit board} and a memory package on the printed circuit board 
{ HEAD ~ The memory module } may include { TAIL ~ a printed circuit board } and a memory package on the printed circuit board
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH