D12121323331311132313232213231232313132313232233132313233313232121211   >>    D1212132333131113231323221323123231313231323223313231323331323212121   <<    D12121323331311132313232213231232313132313232233132313233313232121213   >>      D12121323331311132313232213231232313132313232233132313233313232121212   >>