D12121212121313233313123231323223313132322331323132233133313231323213231311   >>    D1212121212131323331312323132322331313232233132313223313331323132321323131   <<    D12121212121313233313123231323223313132322331323132233133313231323213231313   >>      D12121212121313233313123231323223313132322331323132233133313231323213231312   >>