3778
      +---------
C734B | A0439FE5
       -B4C03
        =====
        F9655F
       -FF88DF
        ======
         F4801E
        -FF88DF
         ======
          F13DA5
         -32ED68
          ======
           6F187

base: 16
letters: 0123456789ABCDEF
difficulty: hard