D12121323331313223313233313131323133313233313132333132322123231111   >>    D1212132333131322331323331313132313331323331313233313232212323111   <<    D12121323331313223313233313131323133313233313132333132322123231113   >>      D12121323331313223313233313131323133313233313132333132322123231112   >>