D12121111111123313133313133313231131323132322331323132321233132322132313231221   >>    D1212111111112331313331313331323113132313232233132313232123313232213231323122   <<    D12121111111123313133313133313231131323132322331323132321233132322132313231223   >>      D12121111111123313133313133313231131323132322331323132321233132322132313231222   >>