# comment
Goal = a ;
a = b | rec "end" ;
b = "c":named_c ;
b = c "d":dname ;
c = "a" | d ;
d = e post_null post_non_null inherit_null ;
inherit_null = e | post_non_null ;
e = ;
e = g ;
#e = e | g ;
f = ;
g = f ;
post_null = "hi" ;
post_non_null = "bye" ;
rec = "hmm" rec | ;