D121212121213132313113313231123313231323132322133313233313231333132322221211   >>    D12121212121313231311331323112331323132313232213331323331323133313232222121   <<    D121212121213132313113313231123313231323132322133313233313231333132322221213   >>      D121212121213132313113313231123313231323132322133313233313231333132322221212   >>