8-4-2-1 8-4-2-2 8-4-2-3 8-4-2-4 8-4-2-5 8-4-2-6 8-4-2-7 8-4-2-8 8-4-2-9 8-4-2-10 8-4-2-11 8-4-2-12 8-4-2-13 8-4-2-14 8-4-2-15