x1 x2 x2 x1 x2 x1 x1 x2 x2 x1 x2 x1 x1 x1 x1 x1 x2x1 x2 x2 x2 x8 x2 x2 x8 x2 x6 x8 x2 x2 x2 x2 x1 x2 x2 x1 x2 x8 x6 x1 x1 x2
