struct node *od_x_do_y(struct node *head, int x, int y){
	if (head != NULL && head->next != NULL)
	{
		struct node *znajdzx = head;
		struct node *znajdzy = head;
		struct node *tail = head;
		struct node *p;

		while (tail->next != NULL) tail = tail->next;

		while (znajdzx != NULL){
			if (znajdzx->val == x){
				while (znajdzy != NULL){
					if (znajdzy->val == y){
						while (znajdzx->next != znajdzy){
							p = znajdzx->next;
							znajdzx->next = p->next;
							p->next = tail->next;
							tail->next = p;
							tail = p;
						}
						return;
					}
					else znajdzy = znajdzy->next;
				}
			}
			else znajdzx = znajdzx->next;
		}
	}
}