D12121111112223313133313132312121111132313232233132213231322331   >>    D1212111111222331313331313231212111113231323223313221323132233   <<    D12121111112223313133313132312121111132313232233132213231322333   >>      D12121111112223313133313132312121111132313232233132213231322332   >>