D1212121212131323223313233231323132313331323331311331323222233131   >>    D121212121213132322331323323132313231333132333131133132322223313   <<    D1212121212131323223313233231323132313331323331311331323222233133   >>      D1212121212131323223313233231323132313331323331311331323222233132   >>