D12121212121313232233132332313231323133313233313113313232213232212311   >>    D1212121212131323223313233231323132313331323331311331323221323221231   <<    D12121212121313232233132332313231323133313233313113313232213232212313   >>      D12121212121313232233132332313231323133313233313113313232213232212312   >>