K N ;
K N 
K N 
K N (
K N )
K N ,
K N 
K N 
K N 
K N 
K N 
K N 
K N 
K N >
K N <
K N =
K N <=
K N >=
K N <>
K N in
K N 
K N 
K N *
K N /
K N div
K N rem
K N 
K N :=
L N Literal
I N ID
S N String
N N Neterm
V N Variable
