[error] DEADLOCK/NODUP: no remaining values
            E22
      +--------
0FE1A | F35493B
       -0FE1A
        =====
        796D23
       -768791
        ======
         79576B
        -768791
         ======
          7D32A

base: 16
letters: 0123456789ABCDEF
difficulty: hard
missing: C