D1212121212131323223313233231323132313331323331311331323221313233311   >>    D121212121213132322331323323132313231333132333131133132322131323331   <<    D1212121212131323223313233231323132313331323331311331323221313233313   >>      D1212121212131323223313233231323132313331323331311331323221313233312   >>