D12121111111123313133313133313231131323132322331323132321233132313132211   >>    D1212111111112331313331313331323113132313232233132313232123313231313221   <<    D12121111111123313133313133313231131323132322331323132321233132313132213   >>      D12121111111123313133313133313231131323132322331323132321233132313132212   >>