[error] DEADLOCK/NODUP: no remaining values
[error] DEADLOCK/NODUP: no remaining values
             6B9
      +---------
71379 | 79891247
       -70A411
        ======
         9426B4
        -582A10
         ======
          504847
         -2BA839
          ======
           35615

base: 12
letters: 0123456789AB
difficulty: intermediate