3146
      +---------
70918 | 202466AA
       -48923
        =====
        8A4546
       -8738A1
        ======
         3A63AA
        -336304
         ======
          35566A
         -365776
          ======
           890A4

base: 11
letters: 0123456789A
difficulty: intermediate
restrictions: no multiplication