#include <CGAL/Exact_predicates_exact_constructions_kernel.h>
#include <CGAL/Nef_polyhedron_3.h>
#include <CGAL/IO/Nef_polyhedron_iostream_3.h>
#include <CGAL/minkowski_sum_3.h>
#include <iostream>
typedef std::pair<point_iterator,point_iterator>
point_range;
typedef std::list<point_range> polyline;
int main()
{
Nef_polyhedron N0;
std::cin >> N0;
};
polyline poly;
poly.push_back(point_range(pl,pl+6));
}