C84A
      +---------
CA1C6 | 0A35257A
       -46830
        =====
        9417A5
       -935998
        ======
          5A807
         -DF172
          =====
          98EEEA
         -9BBD6E
          ======
           965B5

base: 16
letters: 0123456789ABCDEF
difficulty: challenging
hints: 5 << 2