//gc(3,3);
x = cons(10101,0);
y = cons(x,x);
printf("1\n");
gclock(x);
x = nil;
printf("2\n");
gc(3,3);
printf("3\n");
gcunlock(car(y));
printf("4\n");
printf("%a %a\n", car(car(y)), cdr(cdr(y)));
gc(2,2);
printf("5\n");
printf("%a %a\n", car(car(y)), cdr(cdr(y)));