E6C2
      +---------
59AFE | 7F0AFF05
       -59AFE
        =====
        96B80F
       -9B2CB6
        ======
         9B1450
        -9D4DFC
         ======
          92BE55
         -929B72
          ======
            DB18

base: 16
letters: 0123456789ABCDEF
difficulty: medium
missing: 3