D12121212121313233313232313231323123231323223313113313231333132212321   >>    D1212121212131323331323231323132312323132322331311331323133313221232   <<    D12121212121313233313232313231323123231323223313113313231333132212323   >>      D12121212121313233313232313231323123231323223313113313231333132212322   >>