4298
      +---------
EDE62 | C7E6806D
       -664A9
        =====
        E39530
       -EAA45E
        ======
         E8A9C6
        -E09E84
         ======
           DB9ED
          -DDA3D
           =====
            4031

base: 15
letters: 0123456789ABCDE
difficulty: hard
missing: 1