D121212121213132313113313231123313232233133313331313231323221231   >>    D12121212121313231311331323112331323223313331333131323132322123   <<    D121212121213132313113313231123313232233133313331313231323221233   >>      D121212121213132313113313231123313232233133313331313231323221232   >>