{HEAD ~ The device} for converting series of A input data elements to series of A output data elements comprises {TAIL ~ a memory means} for containing these series of input and output data elements 
comprises
{ HEAD ~ The device } for converting series of A input data elements to series of A output data elements comprises { TAIL ~ a memory means } for containing these series of input and output data elements
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH