D121212121213132313113313231123313232233132222132313231323221121   >>    D12121212121313231311331323112331323223313222213231323132322112   <<    D121212121213132313113313231123313232233132222132313231323221123   >>      D121212121213132313113313231123313232233132222132313231323221122   >>