D121213233313223313132322231323132313331323132233132313233313221231   >>    D12121323331322331313232223132313231333132313223313231323331322123   <<    D121213233313223313132322231323132313331323132233132313233313221233   >>      D121213233313223313132322231323132313331323132233132313233313221232   >>