D121212121213132313113313231123313231323132322133313233313233313221311311   >>    D12121212121313231311331323112331323132313232213331323331323331322131131   <<    D121212121213132313113313231123313231323132322133313233313233313221311313   >>      D121212121213132313113313231123313231323132322133313233313233313221311312   >>