1N,2N,3N1 N, 2 N, 3 N1N,2N,3N
3N,4N,5N3 N, 4 N, 5 N3N,4N,5N
10N,20N,50N10 N, 20 N, 50 N10N,20N,50N
5N,20N,40N5 N, 20 N, 40 N5N,20N,40N
