7 1 4 x x 9 3 8 July 8, 2019 16 32 64 128 4 9 x 3 8 x 2 7 x 1 6 3 4 x 1 7 8 x 9 16 bearing 5 6 x 9 )+ 3 4 x 1 )- 7 9 8 9/7 x 4