+<INITIAL> "if" => (Tokens.IF (yypos, yypos + size yytext));
+<INITIAL> "then" => (Tokens.THEN (yypos, yypos + size yytext));
+<INITIAL> "else" => (Tokens.ELSE (yypos, yypos + size yytext));
+<INITIAL> "Skip" => (Tokens.SKIP (yypos, yypos + size yytext));
+