struct node {
struct node *p1;
struct node *p2;
char typ;
char ch;
};
struct node *lookf;
struct node *looks;
struct node *lookend;
struct node *lookstart;
struct node *lookdef;
struct node *lookret;
struct node *lookfret;
int cfail;
int rfail;
struct node *namelist;
int lc;
struct node *schar;