C49B
      +---------
55145 | 46252436
       -55145
        =====
        5B5544
       -50205A
        ======
         BC5523
        -B0C871
         ======
          C97A26
         -C00714
          ======
           96657

base: 13
letters: 0123456789ABC
difficulty: medium
restrictions: no multiplication