given.grammar

S
	( )
	( S )
	S S
	EXPR
EXPR
	OPER
	STMTS
OPER
	( := id OPER )
	( BINOPS OPER OPER )
	( UNOPS OPER )
	CONSTS
	id
BINOPS
	+
	-
	*
	/
	%
	^
	=
	>
	>=
	<
	<=
	!=
	or
	and
UNOPS
	-
	not
	sin
	cos
	tan
CONSTS
	string
	int
	float
	bool
STMTS
	IFSTMTS
	WHILESTMTS
	LETSTMTS
	PRINTSTMTS
PRINTSTMTS
	( stdout OPER )
IFSTMTS
	( if EXPR EXPR EXPR )
	( if EXPR EXPR )
WHILESTMTS
	( while EXPR EXPRLIST )
EXPRLIST
	EXPR
	EXPR EXPRLIST
LETSTMTS
	( let ( VARLIST ) )
VARLIST
	( id type )
	( id type ) VARLIST