D12121212213231323132323323132322331323223313113121123313111121   >>    D1212121221323132313232332313232233132322331311312112331311112   <<    D12121212213231323132323323132322331323223313113121123313111123   >>      D12121212213231323132323323132322331323223313113121123313111122   >>