lssu return LSSU;
lsu return LSSU;
msu return MSU;
+hfisu return HFISU;
+hlssu return HLSSU;
+hmsu return HMSU;
sio return SIO;
opc return OPC;
dpc return DPC;
sls return SLS;
+hsio return HSIO;
+hopc return HOPC;
+hdpc return HDPC;
+hsls return HSLS;
[ \r\n\t] ;
[+\-*/:\[\]!<>()&|=] return yytext[0];