D121212121213132313113313231123313232233133313332213231323132313231323221121   >>    D12121212121313231311331323112331323223313331333221323132313231323132322112   <<    D121212121213132313113313231123313232233133313332213231323132313231323221123   >>      D121212121213132313113313231123313232233133313332213231323132313231323221122   >>