D1212121212131323331312323132322331313232233132313223313331313233313233312321   >>    D121212121213132333131232313232233131323223313231322331333131323331323331232   <<    D1212121212131323331312323132322331313232233132313223313331313233313233312323   >>      D1212121212131323331312323132322331313232233132313223313331313233313233312322   >>