D121213233313223313132322231323132313231333132233132333131212121   >>    D12121323331322331313232223132313231323133313223313233313121212   <<    D121213233313223313132322231323132313231333132233132333131212123   >>      D121213233313223313132322231323132313231333132233132333131212122   >>