struct	node {
	struct node *p1;
	struct node *p2;
	char typ;
	char ch;
};

extern int	freesize;
extern struct	node *lookf;
extern struct	node *looks;
extern struct	node *lookend;
extern struct	node *lookstart;
extern struct	node *lookdef;
extern struct	node *lookret;
extern struct	node *lookfret;
extern int	cfail;
extern int	rfail;
extern struct	node *freelist;
extern struct	node *namelist;
extern int	lc;
extern struct	node *schar;
