int             TYPE
y               VARIABLE
,               SYMBOL
z               VARIABLE
;               SYMBOL
string          TYPE
x               VARIABLE
;               SYMBOL
x               VARIABLE
=               SYMBOL
"a b c"         STRING_DOUBLY_QUOTED
;               SYMBOL
y               VARIABLE
=               SYMBOL
;               SYMBOL
z               VARIABLE
=               SYMBOL
y               VARIABLE
+               SYMBOL
-               SYMBOL
(               SYMBOL
*               SYMBOL
y               VARIABLE
+               SYMBOL
)               SYMBOL
;               SYMBOL