[error] DEADLOCK/NODUP: no remaining values
        ????????
      +---------
72586 | 46A2A279
       -95537
        =====
         92132
        -2A874
         =====
         7A1807
        -7385A5
         ======
          7AA219
         -7385A5
          ======
          ??????

base: 12
letters: 0123456789AB
missing: B
difficulty: medium