lambda1 0 -2 lambda2 1 0 the_lattice_point_paired_with_0 0 -1 the_lattice_point_paired_with_lambda1 0 -2 the_lattice_point_paired_with_2lambda1 0 -3 the_lattice_point_paired_with_lambda2 1 0 the_lattice_point_paired_with_lambda1+lambda2 1 -1 the_lattice_point_paired_with_2lambda1+lambda2 1 -4