4DFB
      +---------
434EC | 86C387E1
       -35A9C
        =====
        7DB4F7
       -761EB0
        ======
         7E067E
        - 5C830
         ======
          49C9E1
         -4DCB6C
          ======
            B916

base: 16
letters: 0123456789ABCDEF
difficulty: intermediate
missing: 2