6618
      +---------
2ABA6 | B9B94506
       -78792
        =====
         48905
        -78792
         =====
         845A40
        -8BB2AB
         ======
           16276
          -2ABA6
           =====
            0A59

base: 12
letters: 0123456789AB
difficulty: medium
missing: 3