E676B
      +----------
51C61 | 581D77DC0
       -51C61
        =====
         7F297
        -B4230
         =====
         E93F8D
        -EFF6D8
         ======
           756AC
          -B4230
           =====
           E54AE0
          -EE87EB
           ======
            EEE36

base: 16
letters: 0123456789ABCDEF
difficulty: medium