[error] DEADLOCK/NODUP: no remaining values
[error] DEADLOCK/NODUP: no remaining values
        ????????
      +---------
93664 | 1B7AB300
       -93664
        =====
        757873
       -735685
        ======
         727100
        -735685
         ======
         ???????

base: 12
letters: 0123456789AB
difficulty: medium