[error] DEADLOCK/NODUP: no remaining values
              40143
       +-----------
865556 | 5062091963
        -865556
         ======
          2167219
         -2663340
          =======
            994696
           -865556
            ======
            7378403
           -7781166
            =======
              60225

base: 10
letters: 0123456789
difficulty: intermediate
restrictions: no multiplication