-s = gram:: !ws Grammar ws
-Grammar = grammar:: NonTerminal +/ ws
-NonTerminal = word !wp ^"=" !wp RHS
+s = ws! Grammar ws!
+
+Grammar = NonTerminal +/ ws
+
+NonTerminal = Word "=" RHS /ws
+
+// use 'a'-'z' or 'a-z' instead of [a-z]?
+// EOF token?
+// #include (with renaming?)