D414
      +---------
8D6EB | BB65EFA5
       -DF59A
        =====
         CE5DF
        -007DF
         =====
          2399A
         -7AB12
          =====
           C4A25
          -007DF
           =====
            C412

base: 16
letters: 0123456789ABCDEF
difficulty: medium