67D4
      +---------
33DA4 | 82579C51
       -33DA4
        =====
        D4F0FC
       -D88EB4
        ======
          C0685
         -22A04
          =====
          0BFB61
         -00672E
          ======
           D38B1

base: 16
letters: 0123456789ABCDEF
difficulty: medium