D121213233313223313132322231323132313112211232233131323133112121   >>    D12121323331322331313232223132313231311221123223313132313311212   <<    D121213233313223313132322231323132313112211232233131323133112123   >>      D121213233313223313132322231323132313112211232233131323133112122   >>