[error] DEADLOCK/NODUP: no remaining values
            738
      +--------
093A6 | 8E6D773
       -6C9D4
        =====
         6D257
        -77163
         =====
          C0D03
         -A3B8C
          =====
           C065

base: 15
letters: 0123456789ABCDE
difficulty: hard