D12121212121313233313123231323223313132322331323132233132311331322311   >>    D1212121212131323331312323132322331313232233132313223313231133132231   <<    D12121212121313233313123231323223313132322331323132233132311331322313   >>      D12121212121313233313123231323223313132322331323132233132311331322312   >>