6DE1
      +---------
07703 | ADF5DAD6
       -07703
        =====
        60D7FA
       -6B790C
        ======
         00612D
        -0B4574
         ======
          6D6BC6
         -698E5A
          ======
           0609E

base: 16
letters: 0123456789ABCDEF
difficulty: medium