2B00
      +---------
C36CB | 64A73BBE
       -C36CB
        =====
        27B59B
       -22A41E
        ======
         446D3B
        -41F30B
         ======
          48A41E
         -41F30B
          ======
           8087B

base: 16
letters: 0123456789ABCDEF
difficulty: hard