D1212121212131323223313233231323132313331323331311331323331323112331   >>    D121212121213132322331323323132313231333132333131133132333132311233   <<    D1212121212131323223313233231323132313331323331311331323331323112333   >>      D1212121212131323223313233231323132313331323331311331323331323112332   >>